Deal Search Pro
Price-aware search: coupons, price history, open-box, refurb.
Choose a site:
Groupon Coupons
Coupons.com
CamelCamelCamel
PriceSpy
Best Buy Open-Box
B&H Used/Open Box
eBay Refurbished
Back Market
Kelkoo
Google Shopping
Idealo
PriceRunner
Opens one tab: your chosen site. Quick Search uses Kelkoo.