Dear WW: There has long been a disease in frogs that make them scarce now. Even forty years ago, I couldn't find frog eggs to let my kids watch them hatch.
But I would not pay even a dollar for a frog.
I tried to find some pictures of Cuban Tree Frogs. Best I could do was a jigsaw puzzle, that you can put together if you are interested.
http://freejigsawpuzzles.com/puzzles/lg_tree_frog_jigsaw_puzzle.htm