If under $5k, use small clamis and do it yourself. Piece of cake. The main thing is not to wait too long or they may be out of business. If they are not going anywhere, collection agencies cost an arm and a leg and don't do anything you can't do yourself. Make the calls, serve them and take them to court. The courts are very friendly to business owners attempting to collect on a debt. That way you can also collect for costs insted of paying an agency a piece of your profits. Just another way to think about it. Best of luck.