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Models of the world don't have to be that old to interest collectors—there are 1960s models on eBay with bids around $100. The only caveat: Buyers are mainly interested in globes from major makers such as Rand McNally, George F. Cram Co. and Replogle. This chart will help you determine your piece's age—for instance, if you see the former name Siam (and not the new name Thailand), the globe could be pre-1939.