# Mellanox ConnectX-6 Dx MCX623106 (100GbE) price tracker As of Nov 6, 2026, Mellanox ConnectX-6 Dx MCX623106 (100GbE) on eBay: used listings start at $757 (median $1,006); new from $988. Is $757 a good Black Friday price for the Mellanox ConnectX-6 Dx MCX623106 (100GbE)? Across the 13 days we checked since Oct 24, its lowest eBay listing was $607 and the median listing was $1,026. Today's low is 25% above that low. [Black Friday check →](https://sharpest.ai/black-friday) [See the cheapest Mellanox ConnectX-6 Dx MCX623106 (100GbE) on eBay (used) — $757 →](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C128148814607%7C0) [New from **$988**](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C840027932819%7C0)[Used from **$757**](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C128148814607%7C0) [Compare new on Amazon →](https://www.amazon.com/s?k=mellanox+mcx623106&tag=sharpestai-20) As an eBay Partner and Amazon Associate we earn from qualifying purchases, at no cost to you. Cheapest now **$757**[See it on eBay →](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C128148814607%7C0) Lowest now**$757** Typical (median)**$1,026** 7 days** 0%** 30 days** —** Live listings**40Buy or wait?** Wait: today's low is 10% above its 19-day average; it has been cheaper recently. ## Cheapest Mellanox ConnectX-6 Dx MCX623106 (100GbE) listings right now | | Listing | Condition | Price + ship | | |---|---|---|---|---| | | Mellanox ConnectX-6 Dx MCX623106AC-CDAT 2-Port 100Gb PCIe Ethernet Adapter - LH Buy It Now offers | Used | $757 sale: was $834, −10% | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C128148814607%7C0) | | | Mellanox ConnectX-6 DX (MCX623106AC-CDAT) Dual-Port 100GbE PCIe Network Adapter Buy It Now offers | Used | $860 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C900040851459%7C0) | | | Mellanox MCX623106AN-CDAT ConnectX-6 DX 100GbE Dual-Port Ethernet Adapter Buy It Now offers | Used | $899 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C168823981743%7C0) | | | MCX623106AN-CDAT Mellanox ConnectX-6 Dx EN (2)100GbE QSFP56 PCIe 4.0x16 NIC Buy It Now | Used | $901 | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C257792655531%7C0) | | | MCX623106AC-CDAT Mellanox ConnectX-6 Dx EN (2)100GbE QSFP56 PCIe 4.0x16 NIC Tall Buy It Now | Used | $901 | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C267810189135%7C0) | | | MCX623106AC-CDAT Mellanox ConnectX-6 DX 100G 2-Ports QSFP56 PCIe Network Adapter Buy It Now offers | Used | $979 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C236944402171%7C0) | | | NVIDIA MELLANOX 2x100GbE MCX623106AN-CDAT ConnectX-6 Dx EN Adapter Card - New Buy It Now offers | New | $988 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C840027932819%7C0) | | | MCX623106AC-CDAT Mellanox ConnectX-6 DX Dual Port 100Gb Ethernet Adapter Card Buy It Now offers | Used | $989 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C175481402065%7C0) | | | MELLANOX MCX623106AC-CDAT Dual Port 100GBE QSFP28 CONNECTX-6 DX EN NIC Buy It Now | Used | $999 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C168825128161%7C0) | | | Mellanox MCX623106AC-CDAT Dual Port 100GBE QSFP28 CONNECTX-6 DX EN Card Buy It Now | Used | $999 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C168825128283%7C0) | | | NVIDIA MELLANOX MCX623106AN-CDAT ConnectX-6 Dx EN Adapter Card 2x100GbE - New Buy It Now offers | New | $1,000 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C287600362053%7C0) | | | Mellanox ConnectX-6 Dx MCX623106AC-CDAT Dual Port 100GbE QSFP56 PCIe 4.0 x16 NIC Buy It Now offers | Used | $1,006 | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C820293896342%7C0) | | | Sealed New MELLANOX MCX623106AN-CDAT ConnectX-6 Dx 100GbE Adapter Buy It Now offers | New | $1,020 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C147597360188%7C0) | | | New MELLANOX ConnectX-6 Dx 100GbE Adapter MCX623106AN-CDAT Buy It Now offers | New | $1,021 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C168705922187%7C0) | | | New MCX623106AN-CDAT MELLANOX MCX623106ANCDAT ConnectX-6 Dx 100GbE Adapter Buy It Now offers | New | $1,024 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C366761576297%7C0) | | | New MELLANOX MCX623106AN-CDAT ConnectX-6 Dx 100GbE Adapter Buy It Now offers | New | $1,024 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C800703602349%7C0) | | | New MELLANOX MCX623106AN-CDAT ConnectX-6 Dx100GbE Adapter In Box MCX623106ANCDAT Buy It Now offers | New | $1,025 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C820268403858%7C0) | | | New MELLANOX MCX623106AN-CDAT ConnectX-6 Dx 100GbE Adapter Buy It Now offers | New | $1,025 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C128130404993%7C0) | | | New In Box MELLANOX MCX623106AN-CDAT ConnectX-6 Dx 100GbE Adapter Buy It Now offers | New | $1,025 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C407187086516%7C0) | | | New In Box MELLANOX MCX623106AN-CDAT ConnectX-6 Dx 100GbE Adapter Buy It Now offers | New | $1,025 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C398127266478%7C0) | | | NVIDIA MELLANOX MCX623106AN-CDAT ConnectX-6 Dx EN Adapter Card 2x100GbE - New Buy It Now | New | $1,026 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C187945269949%7C0) | | | New MELLANOX MCX623106AN-CDAT ConnectX-6 Dx 100GbE Adapter Buy It Now offers | New | $1,033 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C205902185641%7C0) | | | New In Box MELLANOX MCX623106AN-CDAT ConnectX-6 Dx 100GbE Adapter Buy It Now offers | New | $1,035 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C157526257411%7C0) | | | ** Mellanox ConnectX-6 DX 100GbE Dual-Port Ethernet Adapter MCX623106AN-CDAT ** Buy It Now offers | Used | $1,054 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C327273618311%7C0) | | | New MCX623106AN-CDAT Mellanox ConnectX-6 Dx EN (2)100GbE QSFP56 PCIe 4.0x16 NIC Buy It Now | New | $1,201 | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C287621172721%7C0) | | | HPE Mellanox MCX623106AS Dual Port 100 Ggiabit QSFP56 OCP Card P25960-B21 NEW Buy It Now offers | Open box | $1,217 | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C128154420951%7C0) | | | New MELLANOX MCX623106AN-CDAT ConnectX-6 Dx 100GbE Adapter Buy It Now offers | New | $1,239 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C237121888573%7C0) | | | New NVIDIA Mellanox MCX623106AN-CDAT ConnectX-6 Dx 100GbE 2xQSFP56 Buy It Now offers | New | $1,275 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C407156322432%7C0) | | | ** Mellanox ConnectX-6 DX 100GbE Dual-Port Ethernet Adapter MCX623106AN-CDAT ** Buy It Now offers | New | $1,343 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C327395169548%7C0) | | | MCX623106AS-CDAT-HP NEW SEALED Mellanox MCX623106AS-CDAT Ethernet 100Gb 2-port Buy It Now | New | $1,375 free ship | [View on eBay](https://sharpest.ai/go/homelab/mellanox-connectx-6-mcx623106/v1%7C198753224922%7C0) | ## Get a price-drop alert We'll email you when a Mellanox ConnectX-6 Dx MCX623106 (100GbE) listing hits your price. One email per drop, unsubscribe in one click. By continuing you agree to our [Terms](https://sharpest.ai/terms) and [Privacy Policy](https://sharpest.ai/privacy). ## Where today's prices sit 40 live listings by price (item + shipping). The highlighted bar is the cheapest band. ## Price history typical asking price lowest asking price ## Market read Of 40 Buy It Now listings, 21 new (from $988), 19 used (from $757). The cheapest used copy is 23% below the cheapest new one. 82% ship free; the rest add $12.79 shipping at the median. The middle half of asking prices runs $1,000 to $1,375, so anything under $1,000 is in the cheapest quarter. Lowest we have recorded since 2026-10-19: $607 on 2026-10-21; today's cheapest is 25% above that. Asking prices of US eBay listings including shipping, as of 2026-11-06 (checked twice a day); we earn a commission on purchases through these links; parts, broken units and accessories are filtered out. [How we price](https://sharpest.ai/about#method). ## Head to head - [Mellanox ConnectX-6 Dx MCX623106 (100GbE) vs Mellanox ConnectX-5 MCX516A (100GbE)](https://sharpest.ai/homelab/vs/mellanox-connectx-5-mcx516a-vs-mellanox-connectx-6-mcx623106) ## Compare - [Mellanox ConnectX-3 MCX354A (40/56GbE)](https://sharpest.ai/homelab/mellanox-connectx-3-mcx354a) $19.99 - [Mellanox ConnectX-3 MCX311A (10GbE)](https://sharpest.ai/homelab/mellanox-connectx-3-mcx311a) $22.99 - [Mellanox ConnectX-4 MCX4131A (50GbE)](https://sharpest.ai/homelab/mellanox-connectx-4-mcx4131a) $29.49 - [Mellanox ConnectX-5 MCX516A (100GbE)](https://sharpest.ai/homelab/mellanox-connectx-5-mcx516a) $199 - [Intel X540-T2 (10GBase-T)](https://sharpest.ai/homelab/intel-x540-t2) $21.95 - [Intel X550-T2 (10GBase-T)](https://sharpest.ai/homelab/intel-x550-t2) $72.98 - [Intel XXV710-DA2 (25GbE)](https://sharpest.ai/homelab/intel-xxv710-da2) $39.00 - [Intel E810-XXVDA2 (25GbE)](https://sharpest.ai/homelab/intel-e810-xxvda2) $136 - [Chelsio T520-CR (10GbE)](https://sharpest.ai/homelab/chelsio-t520-cr) $24.00 - [Broadcom BCM57414 (25GbE)](https://sharpest.ai/homelab/broadcom-57414) $25.99 --- As of 2026-11-06. Canonical page: https://sharpest.ai/homelab/mellanox-connectx-6-mcx623106