Sounds good. If you do decide to purchase specifically a Diamondback terrapin, be sure that it is captive bred (this is to be said for any turtle purchase) and do your homework first. Here is a link to get some information on Diamondback care. I also personally raise hatchling Diamondbacks so will be glad to answer any questions.

http://www.chelonia.org/articles/Malaclemyscare.htm

-JG