A Koufax rookie just sold for $604,736

A 1955 Topps Sandy Koufax rookie in PSA 9 sold for $604,736 at Memory Lane.
The old public record was $396,000 back in 2022.
A signed 1986 Fleer Jordan rookie, PSA 5, went for $146,579 in the same sale.
The whole auction did over $7.5 million.

Over $600K for a Koufax 9: smart money, or did someone overpay by $200K?