Just an FYI. I have a 2012 Triton Elite22 (will fit 5) that i picked up last year around Spokane for $2200. Looks like yours is longer, but a good 4-6 place aluminum trailer seems to typically sell for $2000-3000 around Washington, Oregon & Idaho.
No idea about the midwest market. Id do a quick search on CL and see if there is the same model out there as yours and what they are priced at.
How to search nationwide on Google.
Enter Site:Craigslist.org and then Enter your search criteria after a single space.
For example
Site:Craigslist.org Triton Elite 22 Trailer