Professional Pricing Society
http://www.pricingsociety.com/
The Professional Pricing Society (PPS) acts as the voice of the pricing profession and provides valuable pricing strategies, publications, research, and other pricing resources. Founded in 1984, it now serves thousands of members, representing all leading industries in over 50 countries.

Kelkoo
http://www.kelkoo.co.uk/
Kelkoo is a shopping comparison website that is present in 10 European markets. It was created in 2000 following a merger with Zoomit, Dondecomprar, and Shopgenie. The website is currently owned by Jamplant, a UK private equity firm, following its sale by Yahoo! in October 2008.

Touslesprix
http://www.touslesprix.com/
Established in 2001, Touslesprix.com is a pioneer in the on-line price comparison. It compares the prices of millions of products from hundreds of vendors.

Beslist
https://www.beslist.nl/
Beslist.nl is the largest online shopping platform in the Netherlands where consumers can compare and buy products. With the range of over 25 million products from 10,017 vendors, it offers a clear overview of the best deals.

Preissuchmaschine
http://www.preissuchmaschine.de/
The price comparison site Preissuchmaschine has been established for almost ten years. It lists more than 3,000 deals and offerings; consumers can compare prices and shop on-line and save money.