The International angle is interesting. These cards may very well be out of the country at this moment.
"Turner, who was a part of a group that purchased Collectors, the parent company of PSA, in early 2021, believes collectors overseas are holding massive cards and aren’t saying anything. 'I guarantee it,' Turner said. 'We have PSA China quietly open in Shanghai. We’re accepting submissions. We have a 100-person Shanghai office now, mainly for coin grading...I bet you that — and this is just gut feel — that half of the ungraded cards in our market are overseas,' Craig said. 'And a lot of it’s high end.'"
https://sportscollectorsdigest.com/n...al-card-market