I am looking at an old John Deere Industrial 400 loader(no backhoe). The sheet metal is in really rough shape and it has a few small leaks. I can't tell how many hours are on it and the owner has no clue when the meter stopped working. The engine starts and runs great. It has to warm up for about 3 minutes before the loader lifts smoothly. What would be a fair price? I have no idea. I appreciate your help.