I just talked to a mom and son. Who were trying to sell me two turtles. I asked what kind? Mom said "Aquatic." .... duh. It wasn't until I listed a few kinds I knew before she kinda confidently said one was a red eared slider and the other was a yellow belly. Currently in a 20 gallon tall aquarium. That threw me a red flag, don't they need bigger? I asked their size and the son said "about this big" and gestured about 6-7 inches. And the yellow belly had a deformed shell. Realistically how big of a tank would those two need? If that's even what they are? I'm so concerned but I don't think I could help. Don't they need big tanks? Also they wanted to sell them to me "set up and all" for $20. Edit: The mom was trying to sell me on that they are super slow growers.