Where can i go to find out how much a certain model camera is worth?

I got a camera for nothing from my paran but it is an old 35 mm camera. I have no need for it so i was going to bring it to a pawn shop but wanted to know its value before going. anyone know where i can go online to find that out..don't want to get jerked around and would like the best price i can if i pawn it...