OLD TM in paper

I called about a 1987 TM and was told its a 2518S. He said it hadnt been used in years. The AC and frig. didnt work. He said they needed charging..?? He also said the wood trim inside could be replaced with a plastic kit from TM.The awning was useable but had a broken L braket..Besides that it was clean and useable.Asking price is $ 2200.What do I need to know or look at on these older models?Any and all advice appreciated.Supposed to go look at it today if not sold. Thanks in advance Bill