I need Help Finding the cheapest Condo/Cabin in Gatlinburg?

Well my friend Leanne is Graduating this year and her grandmother is going to help Finance the trip. but we would like to find the best deal so we can go shopping and stuff =) I'm only 15 so im going to have a hard time myself chipping in. It needs to be 2 bedrooms that can sleep at least 4. In Gatlinburg, Pigeon Forge or somewhere very close to that. around 600 dollars would be absolutly wonderful. 740 is the cheapest i can find. but please help.