So, I talked to the "Sales Consultant" at the RV store where this one is being sold and, as expected, not much help. Since they don't even know the length or year of this unit, I didn't expect them to know much else. He claims they have a clear title in their possession-- but wouldn't the title state the correct year and length for the trailer?
Anyway, they say the only appliance present is the range/cooktop. The refer is missing, we know the furnace is missing from the pictures, there never was an AC unit, and he seemed to think the hot water heater was missing as well. They haven't (and won't) test any of the electrical, water, or gas (the LPG tanks are missing anyway). The sales guy says the floor seems really solid

and that what bits of exposed frame he can see (a-frame) only seem to have surface rust on them

.
The website still has an asking price of $4590, but I'll post some pics below and you'll see a window sticker with 3490 clearly marked. Maybe these are the pics from the yard of whoever sold it to the RV dealer, and the dealer is trying to mark it up $1K without testing anything?