When the Topps Living Set launched in spring, 2017, it brought with a concept that had been tried before — a never-ending checklist — but with the online-only, print-on-demand spin. It was met with some initial trepidation and for good reason. In the past, “living” checklists have eventually died. Also, with new cards each week, the cost adds up.

So for the first couple of weeks, the Topps Living Set did well for online-exclusive standards. But after about a month, print runs took off. Shohei Ohtani topped 20,000 copies, which seemed like a max in this era of the hobby.

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