According to this, discussing the latest quarter, any weakness is in coins, not cards.
Our primary division showed a decline of 16% in our coin business, but an increase of 23% in our trading card and autograph business from the previous year. The U.S. coin business continued to experience soft market conditions in Q3, which impacted the PCGS Vintage, show and bulk services once again.
https://seekingalpha.com/article/417...all-transcript