Buy or wait? Fair price: today's low is within 0% of its 18-day average.
Cheapest Mellanox ConnectX-3 MCX311A (10GbE) listings right now
| Listing | Condition | Price + ship | ||
|---|---|---|---|---|
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MCX311A-XCAT MELLANOX CONNECTX-3 10GBE PCIE SFP+ ETHERNET CONTROLLER CX311A Buy It Now | Used | $22.99 free ship | View on eBay |
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MELLANOX MCX311A-XCAT_A SP 10GB SFP+ CONNECTX-3 PCIE NIC Buy It Now offers | Used | $23.00 free ship | View on eBay |
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MCX311A-XCAT_A MELLANOX SP 10GB PCIE NIC CARD (SFP+ CONNECTX-3) Buy It Now offers | Used | $23.00 free ship | View on eBay |
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MCX311A-XCAT MELLANOX CONNECTX-3 10GBE PCIE SFP+ ETHERNET CONTROLLER CX311A Buy It Now offers | Used | $25.97 sale: was $22.99, −13% | View on eBay |
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MCX311A-XCAT MELLANOX CONNECTX-3 10GBE PCIE SFP+ ETHERNET CONTROLLER CX311A Buy It Now offers | Open box | $25.99 free ship | View on eBay |
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MCX311A-XCAT Mellanox CX311A ConnectX-3 EN 10G Ethernet 10GbE SFP+ PCIe NIC Buy It Now offers | Used | $31.49 | View on eBay |
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** MCX311A-XCAT Mellanox CX311A ConnectX-3 1-Port 10Gbps SFP+ Network Adapter** Buy It Now offers | Used | $34.99 free ship | View on eBay |
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Mellanox ConnectX-3 EN Gigabit Ethernet Adapter - MCX311A-XCAT Buy It Now offers | Used | $36.11 | View on eBay |
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MCX311A-XCAT MELLANOX CONNECTX-3 10GBE PCIE SFP+ ETHERNET CONTROLLER CX311A Buy It Now offers | Open box | $36.99 free ship | View on eBay |
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Mellanox CX311A ConnectX-3 EN MCX311A-XCAT 10G Ethernet 10GbE SFP+ PCI-E NIC Buy It Now offers | Open box | $37.10 | View on eBay |
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MCX311A-XCAT MELLANOX CONNECTX-3 10GBE PCIE SFP+ CARD CX311A WITH SFP Buy It Now offers | Open box | $39.99 free ship | View on eBay |
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MCX311A-XCAT Mellanox ConnectX-3 CX311A 1-Port 10Gbps PCI-e SFP+ Network Adapter Buy It Now offers | Used | $39.99 free ship | View on eBay |
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Mellanox ConnectX-3 EN MCX311A-XCAT 10GbE SFP+ PCIe x8 Network Card Buy It Now | Open box | $48.08 | View on eBay |
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Mellanox MCX311A-XCAT CX311A 10Gb SFP+ ConnectX-3 Full Profile 1-port FW updated Buy It Now offers | Used | $48.16 | View on eBay |
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Mellanox MCX311A-XCAT CX311A ConnectX-3 EN 10Gb Ethernet 10GbE SFP+ PCIe NIC Buy It Now | Used | $49.95 free ship | View on eBay |
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Mellanox MCX311A-XCAT CX311A 10Gb SFP+ ConnectX-3 Full Profile 1-port FW updated Buy It Now | Used | $55.77 | View on eBay |
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Mellanox ConnectX-3 PCIe QSFP+ 1-Port 40Gbps Network Adapter MCX311A-XCAT Buy It Now offers | Used | $56.61 | View on eBay |
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CX311A Mellanox MCX311A-XCCT ConnectX-3 Pro 10 Gbe SP Ethernet Adapter Buy It Now offers | Used | $99.12 free ship | View on eBay |
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Mellanox MCX311A-XCCT Connectx-3 Pro - EN Network Adapter - PCI Express 3.0 X8 Buy It Now | New | $125 free ship | View on eBay |
Recent auctions: last bid seen
The last bid we saw before each auction ended, shipping included. This is not a confirmed sale price: bids in the final minutes are missed, and an auction can end unsold or below a reserve.
| Ended | Last bid seen | Bids | Seen before end |
|---|---|---|---|
| 2026-10-30 | $24.11 | 0 | 2h |
| 2026-10-30 | $24.11 | 0 | 2h |
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Where today's prices sit
19 live listings by price (item + shipping). The highlighted bar is the cheapest band.
Price history
typical asking price lowest asking price
Market read
Of 19 Buy It Now listings, 18 used (from $22.99), 1 new (from $125). The cheapest used copy is 82% below the cheapest new one. 58% ship free; the rest add $6.61 shipping at the median. The middle half of asking prices runs $25.99 to $49.95, so anything under $25.99 is in the cheapest quarter. Lowest we have recorded since 2026-10-19: $22.99 on 2026-10-19 — today matches it.
Asking prices of US eBay listings including shipping, as of 2026-11-05 (checked twice a day); we earn a commission on purchases through these links; parts, broken units and accessories are filtered out. How we price.
Head to head
- Mellanox ConnectX-3 MCX311A (10GbE) vs Chelsio T520-CR (10GbE)
- Mellanox ConnectX-3 MCX311A (10GbE) vs Intel X540-T2 (10GBase-T)
Compare
- Mellanox ConnectX-3 MCX354A (40/56GbE) $19.99
- Mellanox ConnectX-4 MCX4131A (50GbE) $29.49
- Mellanox ConnectX-5 MCX516A (100GbE) $199
- Mellanox ConnectX-6 Dx MCX623106 (100GbE) $757
- Intel X540-T2 (10GBase-T) $18.99
- Intel X550-T2 (10GBase-T) $72.98
- Intel XXV710-DA2 (25GbE) $39.98
- Intel E810-XXVDA2 (25GbE) $136
- Chelsio T520-CR (10GbE) $24.00
- Broadcom BCM57414 (25GbE) $25.99