Mikrotik has that famous CRS305-1G-4S+IN switch with 4 SFP+ for just $135. If you need more ports, CRS309-1G-8S+IN gives you 8 ports for $300. Double the ports

Mikrotik has that famous CRS305-1G-4S+IN switch with 4 SFP+ for just $135. If you need more ports, CRS309-1G-8S+IN gives you 8 ports for $300. Double the ports again, you have CRS317-1G-16S+RM for $400, at $25/port it is the best price for many ports.