Beckett's is nothing more than a guide. And printed guides have built in problems with being timely.
I suggest you either search closed Ebay auctions (which only gives you 15 days of data) or use one of the services that gathers all that data and sorts it for you. I mentioned vintagecardprices.com, only because they are an advertiser here. There are a couple of others. They are a subscription service however.
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Jim Van Brunt
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