If you google search DVC resales you'll get a list. A lot of us bought from Jaki Apatz, who has started her own business (I don't think she's the one that stars out - but I thought we were at two or three now, not just one). If you google, the top hits will give you some names, you can come back and post them here for feedback. Also, while Tom sponsors this site, I think AllEarsNet and Mousesavers may both have different sponsors that may be worth checking out.
As Rob says, pricing is the same and really what you want is the right contract. However, some of the resellers seem to be better at getting the sale through quickly and making you feel like they are on the ball than others. Some really do a lot of work between the time you contact them and close, some really work on having a long relationship with you. That may or may not be important to you.