I was at a local flea market with my friend and there was an "exotic pets dealer" with some RES's in a plastic container, an alligator, a gecko, and some chinchillas. (This should have been my first tip-off that something was wrong.) I checked out the turtles, then walked around for a bit. I mulled it over with my friend and we went back. The guy said they were $20, including the kidney-shaped turtle lagoon (complete with exotic palm tree!) and a bag of pellets. So I decided to get one, and I asked the guy how to pick out a good one. He said they were all healthy and decided to flip them over (!!!) so I could see the bottoms of their shells. I had my friend pick one out for me, because they all looked the same to me!
The guy put my little Filbert in a plastic container with a lid, similar to what you would get live bait in, and a damp paper towel. Which was interesting to watch this little turtle try to move around in. I got him home, set up in his lagoon, and started researching... then realizing what I got myself into!!! (But it's been well worth it so far!)