
Proxy bidding is when an auction site places bids on your behalf, and with your initial permission. I have sold, for instance, a tennis racket, a tennis bag and strings. Of course the service provider auction website owners in this case that would be bidorbuy themselves have the final say on what may or may not be listed on their website and as such may disallow any goods or services, that according to their sole discretion, may be deemed to be inappropriate for sale on the site.