To tell you the truth, you may want to look at a multifunction inkjet or laser machine that has fax capability. Fax machines are obselete and therefore there aren't too many inkjet/laser fax only machines. Sharp has one that was on sale at Staples for $30 the other day.
However, for an extra $20 or maybe less on sale, go get an HP OfficeJet 4215 or a similar machine that does fax as a function. The 4215 can be had for around $60 shipped from Newegg, but there are better promos on them. If you want a laser powerhouse, there's a Samsung multifunction unit with both a sheet feeder and a flatbed for $188 shipped AR from Newegg. I also have used a Brother MFC-3240C which was a very nice unit for faxing, but I now have the HP.
Might be worth it to go that way.