10-15 k ought to get you a nice sail ready boat in the 25-30 foot range. It will be an older boat that will need a lot of maintenence but boats this age all require it. But you should be able to find a decent boat for the money.
You asked for blue water capable. That is kind of a vague term...
Thanks. That's exactly the info I'm looking for regarding size/budget.
Regarding "blue water capable"...I'm a little reluctant to even bring up the discussion. I've seen several other threads derail talking about that. Suffice to say I'm looking for something that will get me around the Caribbean and the Gulf; nothing trans-Atlantic or anything like that.