Ebay classified ad with best offer works for me. It eliminates the timewasters and the format prevents anyone from "accidentally" hitting buy it now. You can also set it up so that stupid offers are automatically rejected.

Plus if it doesn't sell on ebay it costs nothing (not even a listing fee). It is basically free advertising.

Just make up a classified ad for one popular title say for example ACDC (put ACDC in the auction header to get search hits) and then mention in the listing you have other machines for sale and to contact for "more details".

full of shill bidding or auctions pulled early.

The worst lot are the users who have multiple ebay accounts, and who shill on their own .99c auctions to pump the price/or submit fake offers on best offer items to make the item appear "worth it."