Do NOT rush out and buy the first cat you look at. Go to local sailing clubs and talk to owners, they should advise and help you to learn what to look for and recognise what is good value and what is an expensive lesson. You want to buy a cat to enjoy not have it suddenly break something vital when you get a 20+ knot gust. Also know what gear ie good quality mainsheet blocks, downhaul, proper rudders should come with the cat and whether the sails are blown out or good value. The more you know what to look for the more you can save by not having to get expensive bits and pieces