Try to find one around 1988 or later
From what I have heard, the 1988 boats were the start of using a different resin that doesn't blister as much (that is what I have heard from other sources). Try to at least get an MK II. My Catalina 30 is a 1990 Tall Rig Bow Sprit. I paid around 35,000 for the boat. I have done a little work and added a few things, but it was in good shape and a boat in that price should hang around 35,000. There was a boat that was for-sale at Tidewater Marina in Anapolis MD. It was a 1991 and I think that they were asking 38,000. It has been on the market since last year and you might be able to get it at a good price. Try www.yachtworld.com That is a good site for looking for boats. Just type in your permeters and you should find what you are looking for. I absolutely love my 30. It is a great boat, it is stiff, handles well, and I feel very safe in it (It survived 40 mph winds and 8 foot seas off the coast of Smith Point at the mouth of the Potomac River and Chesapeake Bay).