Seminar paper from the year 2018 in the subject Business economics - Operations Research, grade: 1,3, University of Applied Sciences Köln, language: English, abstract: This work deals with online auction. Domestic work is divided into four parts. In the first part, traditional auctions are defined in more detail. After the basics of the topic have been presented and the different auction types have been described, online auctions are worked out from this understanding in the second of this work and how online auctions deal with the traditional auctions Distinguish. In the third part of this work, different competitive markets are explained in order to deal with eBay. After the company was summarized, the fourth part of the work follows, where the German Auction Laws are discussed. The auction is a popular way to put used items up for sale over the internet. Anyone who buys goods at an online auction will then be delivered via the shipping route. With 177 million active users, eBay is one of the largest and most dynamic online auction houses in the world. But eBay is far from the only online auction house. In addition to eBay, the best-known charts of online auctions include MyHammer and Hood.de, as well as many other auction platforms.