Camper value/price

[SWAMP FOX]

I'm looking at buying used 2005 Jayco camper. It's about 26-28' and seems to be in fair to good shape.

The asking price is $4000. I don't know if this is a fair price or if I'm getting taken.

There is some water damage in the front where the master bedroom is and I've provide pix of the damage. I can't tell how serious it is at this point.

Also the hot water heater doesn't work but I've been told it just needs a couple of thermostats. Everything else--AC, toilet, shower, heater, gas stove, oven, micro wave all work the way they're supposed to.

Any advice info would be appreciated.