I friend of mine is wanting to sell me a Canon AE-1 film camera that is probaly 20 or so years old. The battery door is broken the the only problem with the camera. I am currently shooting a roll of film thriugh it ti see how it turns out. He is going to want me to make him an offer on the camera. It has a Canon 5mm lens and a Rickon 80mm to 200mm lens as well. both in good shape. What would be a good price to offer him for the camera? The battery door is a $10.00 fix.