I bought a 1994 3124ks this summer and so far, we haven't had any major problems. We bought it from a TM dealer in Mass who obviously knew what they were doing. The previous owners were an older couple who apparently traveled quite extensively with it. Other than some cigarette smoke odor which came out with a thorough cleaning, the unit was in excellent shape. The price was a little more than I wanted to pay, but I definetly think we got our money's worth! Other than an electrical problem with the taillight that I haven't had a chance to figure out, we are very happy. Bottom line, don't be afraid to purchasing an older unit if it is in good shape and you are buying from a reputable dealer. I don't know if mine is constructed of wood or not. Guess that would be something good to know. I know of no dry rot, course I haven't looked either. Hope this was helpful.