I found a Green Apple Pacman at my Petsmart. Sadly he died of Carcinoma of the Liver which was completely out of my hands. He faught hard for 4 months and I did everything I could, but there was no saving him because there is no known treatment for that form of cancer in frogs. Didn't find out what he had until after he passed and I had my vet perform a Necropsy.
I have even seen dark Red Ornates at Petsmart for $15. Definitely keep your eye on them and make sure you buy them early. The longer they are there the less chance of them being a healthy frog. Best thing to do is find out what day they get their Pacman Frogs in. Mine gets them in on Fridays.