I've pulled a few big ones in my time, but the most memorable was a card from the Exquisite pack below.
A few years ago I received a call from a private collector. This guy tracked me down after googling for a 08-09 Noble Nameplate Jordan card for his collection. I thought he was a crazy stalker/con man. I promptly got rid of him. He was persistent and reached out again a few days later.
An offer was made that I couldn't refuse
$$$$$$$. I said bye-bye to a card that I thought I'd keep forever... I do miss it.
After the deal I was paranoid. I promptly changed my locks and laid low for a few weeks. This card hobby is serious.