On average, trailers in as good of shape as the OP says this trailer is in (without a crack showing of course) will easily sell for 50% 0f their new cost when built. Yes, it does depend on the quality build level of the trailer as a cheapie entry level trailer will usually be showing it's age and not be worth much when 10 years old but a high quality level trailer like DRV or Carriage etc will usually still look very nice inside and out and will sell used 10 years old for a higher percentage of it's cost when built. We see it everyday around here as RVing is huge in our region/area.
Also on average, the higher level RV's are usually purchased/used new by older customers who's kids are grown or gone and usually take better care of their RV's. They seldom have little kids or other age kids grubbing it up or breaking things and they are more particular. Some kids are not well behaved along with some pets anf of course there are some grubby adults also. One look at or in their RV's usually give them away instantly!
