I've seen these engines on Ebay from time to time. I found one doing a quick search. Looks a little dirty.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=7983068898

"All our parts are used, tested and in working condition before shipping, unless otherwise indicated. We offer NO GUARANTEE, NO REFUNDS, NO EXCHANGE. All sales are final. All items are sold "as is", unless otherwise indicated." + low feedback does not inspire confidence!