13 New Rules of Decluttering
Google and Ebay: If an item has no identifying mark, search descriptive words (for example, "green glazed pitcher, grapes on side") to find images or websites that could provide key information. Or browse through eBay's Collectibles & Art section for similar items to determine current market value.
GoAntiques.com: If you know the name, designer, or manufacturer of your collectible—and if it's worth something—there's a good chance you'll find an identical or similar one here.
AbeBooks.com: Curious about whether your yellowing copy of To Kill a Mockingbird has any value? Type in the title, author and date of publication, and this site will search thousands of booksellers to find any offering the same or a similar edition.