Welcome to the site. Hope to see you join the ranks of Escape 19 owners. We are a bit of a cult, you know? Plus, we have been brainwashed and love everything about Escape trailers.
My response to your questions is going to concentrate on selling your Trillium. They are in demand and can bring a good dollar, depending on condition. If you have not done so, you might consider joining a similar site devoted to all fiberglass trailers. They have a posting area to list your unit for sale, but more useful is the ability to go back to prior listings and see what the asking price of different models has been. Granted, you do not see the sale price but I would guess most sales are pretty close to the asking price.
The link is www.fiberglassrv.com