However, there's also plenty of baseline research you can do to better understand your item's potential value. Here, we asked appraisers from two of the country's leading auction houses to share their advice on how to find the market value of your antiques. Christie's and Heritage Auctions serve as great sources to help you find the current market value of pieces. "I recommend looking for auction results within the past 2 to 3 years—5 at the most—because the auction market ships with the overall marketplace. For example, you can imagine that auction prices established before the economic crisis of 2008 are quite different than auction results immediately after that or auction results that may be established more recently."