Paul, I was bidding on the Plank also! Great card! Looks the the PSA 8 Mikan RC set an all time record. Looks like after fees and taxes it will be like $105,000!!! Wowser!
Back in the 1980s, as a college student, I set up at the Ed Keetz show at the Polish Community Center near Albany NY. I sold a Joe Jackson card for $150 (doubled my money) because it had a weird red ink mark on his face.
Got that card back tonite. Paid a smidge more than $150.

Was willing to go higher!
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What goes around.......comes around..... lol
Peace, Mike