As these older units become harder to find the price will go up not down
While this may hold true in the near future, the price of fuel is definitely working against the appreciation of all campers, IMHO.
The scrap option is definitely a possibility, although a sad one.
Having thoroughly and correctly repaired two rear floors over the past three years (and everything that goes with it), I don't think I could face it again, even for a $2000 purchase price.
As they used to say regarding Japanese pilots toward the end of WWII:
The eager are not experienced, and the experienced are not eager.