Lowest now$19.99
Typical (median)$47.25
7 days▼ 5.0%
30 days—
Live listings72
Buy or wait? Fair price: today's low is within 1% of its 18-day average.
Cheapest Mellanox ConnectX-3 MCX354A (40/56GbE) listings right now
| Listing | Condition | Price + ship | ||
|---|---|---|---|---|
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Mellanox CX354A ConnectX-3 VPI QDR IB 10GbE 2 Port QSFP Adapter NIC MCX354A-QCBT Buy It Now offers | Used | $19.99 free ship | View on eBay |
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Mellanox ConnectX-3 CX354A MCX354A-TCBT 2-Port 10Gb InfiniBand PCI-E Server HBA Buy It Now offers | Open box | $20.99 free ship | View on eBay |
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Mellanox ConnectX-3 QDR InfiniBand 10GbE MCX354A-QCBT CX354A Low Profile Card Buy It Now offers | Used | $21.06 | View on eBay |
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MELLANOX CONNECTX-3 MCX354A-QCBT CX354A QDR INFINIBAND DUAL PORT ADAPTER W/CABLE Buy It Now offers | Used | $21.69 sale: was $11.99, −17% | View on eBay |
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Mellanox MCX354A-QCBT ConnectX-3 QDR InfiniBand 10GB Dual-Port FH w/SAS Expander Buy It Now offers | Used | $21.95 free ship | View on eBay |
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Mellanox ConnectX-3 VPI 40 / 56GbE Dual-Port QSFP Adapter MCX354A-FCBT CX354A LH Buy It Now offers | Used | $22.64 | View on eBay |
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Mellanox MCX354A-FCBT ConnectX-3 FDR Infiniband + 40GigE Adapter - High Profile Buy It Now offers | Used | $23.38 | View on eBay |
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Mellanox MCX354A-FCBT ConnectX-3 FDR Infiniband + 40GigE Adapter - Low Profile Buy It Now offers | Used | $23.38 sale: was $18.71, −20% | View on eBay |
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Mellanox ConnectX-3 MCX354A Dual Port QSFP+ PCIe Network Adapter MCX354A-TCBT Buy It Now offers | Excellent - Refurbished | $23.99 free ship | View on eBay |
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Mellanox MCX354A-FCBT ConnectX-3 FDR InfiniBand 40GbE Dual QSFP PCIe x8 Card Buy It Now offers | Used | $24.99 free ship | View on eBay |
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Mellanox ConnectX-3 Dual-Ports 10GB/s 10Gigabit Ethernet PCI-E MCX354A-TCBT Buy It Now offers | Used | $24.99 free ship | View on eBay |
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Mellanox MCX354A-QCBT CX354A ConnectX-3 VPI QDR IB 10GbE Dual-Port QSFP PCIe Buy It Now | Used | $26.06 | View on eBay |
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Mellanox ConnectX-3 VPI 40 / 56GbE Dual-Port QSFP Adapter MCX354A-FCBT CX354A Buy It Now offers | Used | $26.72 sale: was $15.59, −21% | View on eBay |
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MCX354A-QCBT Mellanox ConnectX-3 2-Port 10Gbps PCI-e QSFP Network Adapter Buy It Now offers | Used | $26.99 free ship | View on eBay |
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Mellanox Technologies ConnectX-3 MCX354A-FCBT 2-Port 10/40GB NIC Network Card Buy It Now offers | Used | $29.38 | View on eBay |
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HP Mellanox 544QSFP 649281-B21 MCX354A-FCBT Firmware 40GbE PCIe ConnectX-3 NIC Buy It Now | Used | $29.95 free ship | View on eBay |
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Mellanox MCX354A-FCCT Crossflashed from MCX314A-BCCT ConnectX-3 Pro Infiniband Buy It Now | Used | $29.95 free ship | View on eBay |
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Mellanox MCX354A-FCBT 40Gb Ethernet 56Gb FDR Infiniband ConnectX-3 Pro QSFP PCIe Buy It Now | Used | $29.95 free ship | View on eBay |
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Mellanox MCX354A-QCBT CX354A ConnectX-3 QDR IB 10GbE Dual-Port QSFP PCIe Buy It Now | New | $32.99 free ship | View on eBay |
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Mellanox ConnectX-3 VPI MCX354A-FCBT 40GbE/56Gb Dual QSFP Adapter Buy It Now | New | $33.61 | View on eBay |
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Mellanox ConnectX-3 QDR InfiniBand 10GbE MCX354A-QCBT CX354A High Profile Card Buy It Now offers | Used | $33.81 sale: was $49.00, −31% free ship | View on eBay |
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Mellanox ConnectX-3 QDR InfiniBand 10GbE MCX354A-QCBT CX354A Low Profile Card Buy It Now offers | Used | $33.81 sale: was $49.00, −31% free ship | View on eBay |
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Mellanox MCX354A-QCBT SAS Dual Port 10GbE PCI-e ConnectX-3 NIC Network Card C5 Buy It Now offers | Used | $34.38 | View on eBay |
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Mellanox ConnectX-3 QDR InfiniBand 10GbE MCX354A-QCBT Tall Profile Card TESTED! Buy It Now | Used | $35.00 free ship | View on eBay |
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Mellanox ConnectX-3 QDR InfiniBand 10GbE MCX354A-QCBT Low Profile Card TESTED! Buy It Now | Used | $35.00 free ship | View on eBay |
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MCX354A-FCBT Mellanox ConnectX-3 PCI-e 3.0 x8 10GBase-X QSFP Dual-Port Adapter Buy It Now offers | Used | $38.00 free ship | View on eBay |
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Mellanox MCX354A-FCBT CONNECTX-3 40/56GB DP LP Buy It Now offers | Used | $39.95 free ship | View on eBay |
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Mellanox CX354A 2 Port ConnectX-3 FDR InfiniBand 40GbE QSFP Adapter MCX354A-FCBT Buy It Now | Used | $39.99 free ship | View on eBay |
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** MCX354A-FCBT Mellanox ConnectX-3 2-Ports 40Gbps PCI-E QSFP+ Network Adapter** Buy It Now offers | Used | $41.00 free ship | View on eBay |
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Mellanox MCX354A-FCBT ConnectX-3 CX354A 2-Port 40GbE Buy It Now offers | Used | $41.00 | View on eBay |
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Where today's prices sit
72 live listings by price (item + shipping). The highlighted bar is the cheapest band.
Price history
typical asking price lowest asking price
Market read
Of 72 Buy It Now listings, 64 used (from $19.99), 7 new (from $32.99), 1 refurb (from $23.99). The cheapest used copy is 39% below the cheapest new one. 65% ship free; the rest add $14.39 shipping at the median. The middle half of asking prices runs $32.99 to $113, so anything under $32.99 is in the cheapest quarter. Lowest we have recorded since 2026-10-19: $19.99 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 MCX354A (40/56GbE) vs Chelsio T520-CR (10GbE)
- Mellanox ConnectX-3 MCX354A (40/56GbE) vs Mellanox ConnectX-4 MCX4131A (50GbE)
Compare
- Mellanox ConnectX-3 MCX311A (10GbE) $22.99
- 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