Easy to start a new thread, just browse to a likely section (General Discussion, maybe) and pick the New Thread button, give it a catchy (useful) title, add some sentences, e voila!
And if your thread title is something like "Looking for a cruiser under $300K" -- and your post hums a few bars about what features you'd like (separate stall shower) and features you don't want (teak), lots of folks here can probably provide good ideas.
In in the meantime, I wouldn't worry too much about cost first. Find boats you like, eliminate ones you don't, eventually that'll help you home in on decent candidates.
You might find some you like but are too expensive, for example, but then the same models a year or two older may come on the market -- or may already be out there somewhere -- and Bob's Your Uncle!