Froogle:
Developed by Google, Inc. One of the most promising price comparison sites to date.
BizRate:
One of the largest price search sites. Over 30 million products listed.
Shopping.com:
Child of Dealtime and Epinions, now merged to provide you with three shopping search engines that feature your products separately, yet the same.
Yahoo Shopping:
Complete Yahoo Shopping data feed creation and maintenance solutions.
MSN Shopping:
Complete MSN Shopping data feed creation and maintenance solutions.
NexTag Shopping:
Complete NexTag data feed creation and maintenance solutions.
PriceGrabber Shopping:
Complete PriceGrabber data feed creation and maintenance solutions.
Audio Review Marketplace
Audio components for sale by owners.
Audiogon
High end audio classifieds and auctions.
Audio Shopper
Short duration classifieds from this fast and simple website.
Canuck Audio Mart
Hifi site for Canadians to buy and sell from other Canadians.
AudioWeb Marketplace
Online marketplace of high end audio, home theater equipment.
Aural Audio
Hi-end audio components and hifi audio equipment for sale in classifieds.