My dad used to call it "The mentality of being poor"that buyer had more money than he could safely be responsible for.
I know who it was that sold that single round, he was being facetious and didn't expect it to "take off". He is giving all the excess proceeds to charity.Including the guy selling 1rd (one round) of 22LR, it was on "Gun Broker" the other day.
I also noticed shipping was a flat $8.50, wonder how much trouble the seller will be in if he doesn't declare the package contains hazmat