You might find a good buy on a used bow on eBay, but you risk getting a clunker as well. If you go that route be sure & email lots of questions to the seller & check his eBay history.
Ultimately I'd suggest a Chekmate Falcon priced at somewhere between $200-$300 *NEW*. Awesome bows at a fantastic price. Get ahold of Chad at:
www.recurves.com . He is a Chekmate dealer & is a very honest, knowledgeable, & helpful guy. Chad usually has a good selection of bows in stock & I bet he'd be happy to help you out.
Good luck & welcome to the pack!