[Update March 2017 - auctionata has suspended its activities] Auctionata is a German start-up which was founded by 2012 by Alexander Zacke, a former, talented eBay power-seller. The huge success today of the company makes it a major online competitor for the biggest auction houses.
LotPrivé is a site where art, antiques, jewellery and other valuables can be bought and sold. It allows potential buyers to hunt around for artworks or collectibles which have been valued by auction houses, thus making art purchase easier and more accessible.
The Auction After Sale site combines the advantages of the Internet with those of traditional auctions, by allowing to bid on thousand of lots recently unsold at auctions, and make good deals.