Re: NEWBIE on board ! PLEASE HELP! A 78 motorhome with parts that are difficult to locate and a rotting floor, which probably also means it leaks, is on motorhome that is worth little more than salvage value. I would pay no more than what I figured that I could get for what might be possible to resell. That is particularly true since you have already indicated that you have no real RV experience and little knowledge of them. Consider that a new refrigerator will cost you at least $1000, an air conditioner nearly $500, a water heater $400 and a furnace about the same. Then consider what the floor could involve to repair it. I have only 35 years of RV ownership and a career in electro/mechanical service work along with 9 years of living in my RV fulltime, so just take that as one opinin. If you want to risk it, go for it but do it with our eyes wide open.