I have some lying around, but I use them... I have an 8 port for my home use, and a 24 port i use for LAN parties.
You can pick up an 8 port for under $40 including postage, either from ebay or online computer stores.
I threw out a 24 port 10mbit hub, but that doesnt help you much does it (its abit slow for file transferres anyway)
Your other option is if someone has an old unused modem/route (4 port) you could just use that as a switch.