Wow.
Well, here's one for all of us with smaller budgets.
I'm pretty sure this is the card I paid the most for. Around 235.
The most I've spent on a lot was about 700 for the little batch of 8 SL blankbacks I got from Ebay maybe 10 years ago.
Of course I'm not counting nice stuff I bought decades ago when it was cheap. Probably the best buy was the Carolina Brights Red Cobb. A beater, but it was only fifty bucks.
The early 1900's Fred Parent bat I got in a swap for a modern store bat after it got cracked in a softball game is probably the best non-card deal.
Steve B