Bidsquare

Bidsquare, a platform that lets the public take part to online auctions proposed by over 100 selected auction houses.

auctionata

[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.