Catawiki is an online auction house for collectibles that was founded in Assen in 2008. It works on the basis of voluntary contribution to the online catalogue of unique items. The catalogue allows users to track items and their prices and to offer objects up for sale. This functionality distinguishes Catawiki from other operators such as eBay. Objects are not inspected by Catawiki, but the organization included an elaborate system for feedback and evaluation of pieces and auction to maintain authenticity and service quality.