RePurpose The HGTV show Cash & Cari is the inspiration for this deal of an app. Using GPS, you can find estate sales, schedule your own, or watch clips from the TV show.
ANTIQUES ROADSHOW Another TV-inspired app, but this one has you collect virtual pieces with a simulated appraisal system, which provides a decent education when it comes to pricing antiques.
eBay Duh. You can search eBay's database for antiques and makes bids during online auctions.
MyCityAntiquing This app just came out and is useful for travelers. It's basically a one-stop shop for finding antique dealers, auction houses, and more. 50 cities are featured so far, and the developer plans to add a bunch more