Consider that's a 30 year old rig... it could be in most any condition from absolutely fine to ultimate fail. It all depends on how the previous owner used and stored it. It's just like buying a used car, except you also have to buy a used house with it... When I consider buying used stuff, and negotiating price, I evaluate 'worst case' and what kind of money and time I need to put into fixing things... There will always be something that needs fixed on an old RV, and that's even after you own it. Both car and house need to be considered... I suggest to get it inspected by someone who knows RV's and also get a mechanic to inspect the engine, drive train, brakes, suspension. First impressions, if it smells dank or moldy inside then it has roof leaks and that's a major problem issue because the walls could be rotted inside and not worth repairing. You'll never really get the mold smell out of it and some people get sick from mold. You might also see stains on the interior ceiling or peeling wallpaper as an indication of water damage. Roof leaks are common and a minor corner or small area is not too worrisome as long as it doesn't smell. But walk away from any significant water damage...because it's big $$$$. About that time frame was when manufacturers transitioned to better appliances and most every RV maker was using the same stuff. Mid 90's for sure will have a lot of repair parts and manuals available, but mid to late '80's I'm not so sure 'cause you're right on the bubble. In the house, check all the appliances and things like fridge, stove, water pump, water heater. All need to be checked for operation as well as leak check the LPG hoses and lines. Be on the look out and wary of previous owner self-repairs or monkey'd up work. Generator will likely need a carburetor replaced/rebuilt and oil change because the carburetors clog up when in storage. One indication of this would be a smell of old gasoline in the tank. The '80's RV's had old style noisy generators and it was about that time frame when they started going to the more quiet styles. RV's mostly sit, so I always think tires might be needed. You can find date codes on the tires and replace them at 5 years old (4yrs for Michelins) regardless of tread depth. Check and change all the fluids, anything rubber on the engine and under the chassis, front to back. An older rig can be a real gem or a potential can-o-worms. Just get someone you know and trust to look at it and consider costs of repairs...