I say go for it. I got my full 55 gallon setup for $50, and everything was in perfect working order. I can't say much for the guy's taste in gravel and decorations, but otherwise I got an excellent deal. :P Some people lose interest, or they have to move and can't take such a big tank, and just need to get rid of it. The guy whom I got my 55 from just didn't have time to keep up with it, and it eventually became more of his little brother's. In that instance the mom was the one doing maintenance, so they were happy to see it go.