Yes, Jim Polk appraised our 1964
30' and wrote an excellent appraisal report accepted by our RV insurance carrier (for a value higher than the purchase price we negotiated). His expertise is in aluminum vehicles such as private jet aircraft (Gulfstreams, Lear, etc.) and Airstream trailers (2/3rds of his appraisals).
If he cannot come onsite where your trailer is in Nevada (he's based in Santa Barbara), he may be able to do an accurate appraisal if you provide clean detailed 360 degree photos, purchase description details, etc.
He'll do a great job!