I don't understand it. You've got a nice boat, with a head, and a 4 stroke with very low hours. On top of that I feel your price is great. Maybe you should find a well priced used trailer that will work for your boat b cause that's the only thing I can see that may prevent some from buying. I wish I was ready to upgrade because I would be interested.
You probably could get a nice used trailer fro about 2.5-3k.
Maybe also add some pics here, I know people can click on craigslist but maybe that will help.
Hope you have better luck,
Kevin