I noticed that in some auctions, the US banknotes with million serial numbers (ten million, twenty million, etc) are even more expensive than those with solid numbers. I am very curious why people like one digit number trailing many zeros so much.
This also brings another question, that says, how do people like other million serial number banknotes ranging from 01 to 99 millions? I guess some numbers like 01000000, 11000000, 22000000, which are binaries, are also more popular than the ones like 23000000?