It’s anybody’s guess in the current market. If you’re in the Bay Area or coastal Southern California, that’s good for a bit more. Cosmetically you’ve done a nice job with the interior rehab. As a buyer I’d also be evaluating the frame,
axle, floor,
tires,
brakes (have them?), belly band, windows… so I’m wondering if any of that has had recent attention.
This is a pretty uncommon model, but pricewise it will be comparable to other small 13-15’ molded trailers with the same basic layout. Best place to review current and recent sales is
www.fiberglass-RV-4sale.com. Current offerings are slim, so you’ll probably want to look through the archives. Don’t limit yourself to Trilliums.
Wild guess, I’d say something in the $8-10K range, maybe more depending on your location and the other unknowns I mentioned.