Be thankful you're not in Alaska, the few used tractors in that range you see up here are clapped out and priced outrageously.
Tractors that size hold their resale because they are so useful. You're best bet is to find one equipped with all the attachments you want and pay what it costs. In the long run it'll be much less than adding attachements to a bare tractor. A year or two back their was a like new Kubota 30 horse (97 hours and stored in a garage) with loader, backhoe and box pan that sold on ebay for $19k.
