MusicStack 
Search hundeds of record stores for CDs, vinyl, and related merchandise.
http://musicstack.com/Guvnor Music Portal
Offers a service to compare musical equipment and books from a variety of UK stores.
http://www.guvnor.com/
VinylSearcher
Online vinyl search service in the UK.
http://www.vinylsearcher.com/
A Music Area
Compares CDs and cassette price at 10 online music stores.
http://www.amusicarea.com/
DJ Nexus
Compare prices and listen to sound clips from about 20 dance vinyl shops.
http://www.djnexus.com
