Plenty used on ebay at low cost. Quad port 1G (two sets of bypass) go for $25. Dual port (one set) 10g-baseT is maybe $30ish. Fiber bypass nics are also available, they'll have direct fiber connectors rather than SFP+ though (bypass will be optical).
Comments
Plenty used on ebay at low cost. Quad port 1G (two sets of bypass) go for $25. Dual port (one set) 10g-baseT is maybe $30ish. Fiber bypass nics are also available, they'll have direct fiber connectors rather than SFP+ though (bypass will be optical).