Free at the Applie iTunes Store, SnapTag is an app that lets you ask your friends to rate a deal before you make the purchase. Take a photo of the deal, add a description and the price – then SnapTag uses your social networks and the SnapTag network to ask others to rate the deal before you lose any coin. “It’s fun, easy to use, and could save you a bundle. SnapTag is the social way to shop smart.”
SnapTag is the newest app to crowdsource advice and works for any type of product while allowing you to connect your Facebook and Twitter accounts to source as much advice as possible from those you trust (your friends).
Note (Feb. 2014): This service is no longer available.