Check websites for ads - you will find many more opportunities than in your local paper. This site has an excellent classified ad section. Also try www.boattraderonline.com, www.thebeachcats.com, and try yahoo classifieds as well. Hobies frequently come up on ebay although that might be a risky proposition unless it's close enough to really inspect (or get one of us to check it out if it's close).

Cats generally (unless you're talking about something super high performance) start flying a hull in 10 to 12. Some a little sooner, some a little later.