Buy or wait? Fair price: today's low is within 0% of its 18-day average.
Cheapest Mellanox ConnectX-4 MCX4131A (50GbE) listings right now
| Listing | Condition | Price + ship | ||
|---|---|---|---|---|
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Mellanox ConnectX-4 40GB Ethernet Card CX4131A MCX4131A-BCAT Low Profile Buy It Now offers | Used | $29.49 free ship | View on eBay |
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Mellanox CX4131A ConnectX-4 40GB QSFP28 PCIe 1-Port Card MCX4131A-BCAT LOW Brack Buy It Now offers | Used | $39.99 free ship | View on eBay |
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Mellanox MCX4131A-GCAT ConnectX-4 Buy It Now offers | Used | $39.99 free ship | View on eBay |
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Mellanox ConnectX-4 Lx MCX4131A-BCAT 40GbE Single Port QSFP28 PCIe x8 NIC Buy It Now offers | Used | $42.99 free ship | View on eBay |
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Mellanox ConnectX-4 Lx MCX4131A-GCAT 50GbE Single Port QSFP28 PCIe 3.0 x8 NIC Buy It Now offers | Used | $42.99 free ship | View on eBay |
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Mellanox MCX4131A-GCAT ConnectX-4 1-Port 50Gbps PCI-e QSFP28 Network Adapter LP Buy It Now offers | Used | $44.99 free ship | View on eBay |
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Mellanox ConnectX-4 Lx MCX4131A-GCAT 50GbE NIC + 2m 40G QSFP DAC Buy It Now offers | Used | $53.16 | View on eBay |
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MCX4131A-GCAT Mellanox ConnectX-4 1-Port 50Gbps PCI-e QSFP28 Network Adapter Buy It Now offers | Used | $56.99 free ship | View on eBay |
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Mellanox ConnectX-4 Lx CX4131A 50GbE MCX4131A-GCAT Buy It Now | New | $59.99 free ship | View on eBay |
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MCX4131A-GCAT Mellanox ConnectX-4 Single-Port 50GB/s QSFP28 Network Adapter Card Buy It Now offers | Used | $59.99 free ship | View on eBay |
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Mellanox ConnectX-4 40GB Ethernet Card CX4131A MCX4131A-BCAT Buy It Now offers | Used | $81.47 | View on eBay |
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Mellanox MCX4131A-GCAT ConnectX-4 50Gigabit 50GbE Ethernet EN Adapter Card Buy It Now offers | Used | $144 | View on eBay |
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NEW!! MCX4131A-GCAT MELLANOX CONNECTX-4 50GB SINGLE PORT NETWORK ADAPTER CX4131A Buy It Now offers | New | $175 free ship | View on eBay |
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Mellanox ConnectX-4 Lx EN Network Adapter MCX4131A-GCAT Buy It Now | Open box | $250 free ship | View on eBay |
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Mellanox Connectx-4 Mcx4131a-bcat 40gigabit Ethernet Card Pci Express 3.0 X8 1 Buy It Now | Open box | $349 free ship | View on eBay |
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Where today's prices sit
15 live listings by price (item + shipping). The highlighted bar is the cheapest band.
Price history
typical asking price lowest asking price
Market read
Of 15 Buy It Now listings, 13 used (from $29.49), 2 new (from $59.99). The cheapest used copy is 51% below the cheapest new one. 80% ship free; the rest add $15.00 shipping at the median. The middle half of asking prices runs $42.99 to $144, so anything under $42.99 is in the cheapest quarter. Lowest we have recorded since 2026-10-19: $29.49 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-4 MCX4131A (50GbE) vs Intel X540-T2 (10GBase-T)
- Mellanox ConnectX-4 MCX4131A (50GbE) vs Intel XXV710-DA2 (25GbE)
Compare
- Mellanox ConnectX-3 MCX354A (40/56GbE) $19.99
- Mellanox ConnectX-3 MCX311A (10GbE) $22.99
- Mellanox ConnectX-5 MCX516A (100GbE) $199
- Mellanox ConnectX-6 Dx MCX623106 (100GbE) $757
- Intel X540-T2 (10GBase-T) $21.95
- Intel X550-T2 (10GBase-T) $72.98
- Intel XXV710-DA2 (25GbE) $44.00
- Intel E810-XXVDA2 (25GbE) $136
- Chelsio T520-CR (10GbE) $24.00
- Broadcom BCM57414 (25GbE) $25.71