On Yugster.com you can find a factory refurbished GT 7 wi-fi and with 3G, Sprint version, but without the contract for $255.00. You have to go to the Sale tab called YugOver Deals.
I bought one and received it last week. It is just like new. It has 2.2 on it when you get it, but I activated it on Sprint on a 1Gb plan for $19.99/month (no long-term contract) and it notified me there was a firmware update ready. I updated it, and it now runs Gingerbread. It is working great. I have read that you can upgrade through Kies software to Gingerbread, but I wanted 3G accessibility for navigation programs, so went with the 1Gb data package. I use wi-fi for all but navigation.
I am extremely pleased with my purchase and with my GT 7.