I think you will find with very minor research that NADA is a lousy source for pricing of our
The main reason is that it only takes into consideration units sold at dealers, and so few actually end up at dealers that the sampling is small. Not enough to get a real world idea of the one on one sales.. which 99.9% of these are.. including when they are new (No dealer network.. factory direct only) There are only a couple with dealers new.. and those are few and far between.
The best place to find typical pricing for fiberglass trailers is actually here on this website, or a perusal through recent ebay listings that have been completed will also tell part of the tale.
Our trailers are pretty much bullet proof due to the construction, so trying to compare a 10 year old glass rig with a 10 year old stick built one is apples to Oranges. The construction is totally different.. making them different in their durability and longevity.
Many units here are 30+ years old and still as structurally reliable as the day they were made.. the only comparison you can make to other rigs is to the standard equipment (Appliances, frame, propane
tanks.. the list of typical items) Even our axles are different, for the majority of units.
Fiberglass trailers hold their value.. that's a fact.