I haven't really seen these below $200 often. This gives you four ports and a low power NIC since it's X710 based not the older X5__ series. https://www.ebay.com/itm/Intel-Dell-X710-DA4-DDJKY-Quad-Port-10GbE-PCI-E-Full-Height-Network-Adapter/283533175925 Maybe it's good for a VMware or Proxmox host.
Best offer is up too. Heck you can add https://www.ebay.com/itm/MikroTik-CRS309-1G-8S-IN-Cloud-Router-Switch-8xSFP-1x-GLAN-PoE-In-RS232-Route/173800746116 for $225 + shipping too which let's you get more ports if you'd want to expand.
Best offer is up too. Heck you can add https://www.ebay.com/itm/MikroTik-CRS309-1G-8S-IN-Cloud-Router-Switch-8xSFP-1x-GLAN-PoE-In-RS232-Route/173800746116 for $225 + shipping too which let's you get more ports if you'd want to expand.