I was never in the market for a GoPro so I don't know if this is a good deal, but the Sports Chalet in Riverside on Tyler has used GoPro Hero 2s for $75. They are sold "As is". I took a gamble and bought one. Couldn't use the coupon on it though. I'd still try, you might get lucky.
Check the lens on the case. A couple were badly scratched. Out of the box the unit would freeze up and I had to remove the battery to reset it. Did some research online and ended up doing the firmware update. Works fine now
PowerPro wasn't on sale there tho