What is your sailing goal long term? Are you planning on coastal sailing mostly? You can use the search engine on Yachtworld, set your parameters (under 30K, size of boat, year, etc) and come up with a sizable list. Here's a nice 39 ft Gulfstar for under 30K:
View Boat Photos - YachtWorld.com
I have no connection to this boat, just thought it would work for you.