Few if any Trilliums are going to fit within that budget in restored/refurbished condition. If you find one, it will very likely be a project, but perhaps not described as one. Vintage Trilliums tend to sell for less in Canada, particularly after doing a currency conversion.
You will see Scamp
13s within that budget, older ones.
The market really dictates price. I would have loved to have found a Trillium
ready to go within that budget. Instead, I found a project.
Look at the FG for sale
website, and click on sold
trailers. While they don't list the actual sold
price, most FG trailers sell for close to asking price. That will give you an idea of prices.
I've seen nicely restored and ready to camp Trilliums in the USA in the $8000 to $10000 price range lately. They enjoy a vintage premium which in my opinion exceeds the value of the trailer. But they are pretty cool and I love mine!
I looked at some vintage Trilliums last year in the $6,000+/- range that were walk aways, bigger projects with bigger defects than I was ready to face. Both sold to other buyers shortly after I passed on them and neither was called a project. But I would describe rotten plywood in the floor, non-functioning appliances, leaking window seals and belly band, etc. to be projects. I keep waiting for those buyers to appear here, asking "how do I fix this".
Be sure to educate yourself on common issues on whatever brand trailer you are seeking. In this internet age, there is no reason to be surprised by defects after purchase, ones that are well documented. Some people seem to buy on impulse, and then are shocked later when they discover common problems.
13s are more plentiful, and seem to not get the "coolness" premium you see on vintage Bolers and Trilliums.