Try eBay. There are lots of older sailboats of good vintage for under $10K. Maybe you could spend a bit of your budget on travel to look at a particularly good prospect?
For example, there's a nice Cal 25 on the lower Chesapeake, with a Buy-it-Now price under $2K. Also a Pacific Seacraft, and a number of others.
Don't be put off by age. Pedigree is more important, as is present condition and care shown by previous owner(s). There are a few older boats which are in A-1 condition.
Virtually any boat you find will be a better bet than a Hunter, IMO!