1. Google Shopping

google.com

2. Nextag

nextag.com

3. Shopping

shopping.com

4. PriceGrabber

pricegrabber.com

5. Shopzilla

shopzilla.com

6. Become

become.com

7. Bing Shopping

advertise.bingads.microsoft.com

8. Pronto

shopping.net

9. Coupons

coupons.com

10. BizRate

bizrate.com

11. ShopAtHome

shopathome.com

12. SlickDeals

slickdeals.net

13. Woot

woot.com

14. Shopzilla

shopzilla.com

15. Shop

shop.com

16. FatWallet

fatwallet.com

17. ShopLocal

shoplocal.com

18. DealNews

dealnews.com