Must be a heck of a buy if you are willng to tow it from TN to CA. I saw an Amerigo
out that way a month ago and the cost to go after it was prohibitive, not to mention any fixing needed on-site. I would guess that you could get a hefyt bill from an RV shop. Adding or fixing brakes
and/or repacking wheel bearings $150-$1000, new tires
$200, rewiring/repairing the trailers lights
$100, And does the propane refrigerator
Personally I would find and pay a local RV tech $100 to take a look at what's there first. And ferget anything the seller is telling you and, be sure to get it titled in your name in TN. By the time you get to CA with a 3rd party title/or worse yet, a Bill of Sale, you may be in deep-doo-doo trying to get it titled and registered.
I once bought an Airstream Bambi with a flakey title
that turned out to be stolen out of a storage facility by the seller, who owned the storage lot.....
I was lucky, I got my money back, and the seller got a free stay in the X-bar Hotel.