Go to the ebay site and do a search for whatever it is you are looking for. Be careful though...ebay items tends ot be over priced. Do your homework before you buy.
There are a few good deals, but watch out for "unable to test-power cord not included". A clear sign it doesnt work. Look for items where seller really does certify that unit is working OK not just looks OK. Final word: Watch out for the shipping charges. Some are really over the rate. Good Luck.