online antique children's book value guide?

Answer 1

I don't know of an antique guide, but there are a few ways to find value.

www.bestbookbuys.com compiles inventory of a variety of online book dealers, including the big ones like half.com, powells, alibris and abebooks. You can see what other people are trying to sell their copies for.

ebay has a feature that will email you when a listing that meets your criteria is listed, so you don't have to check every few days. This way, you can see what things actually sell for, not just the asking price. You can also search the last 30 days of their auctions to see what has sold recently.

Old books can be very valuable, or practically worthless. It depends on condition and availability, and, of course, demand.