fistfull of dollars

So a couple of days ago, this young gentleman came into the store and marched up to the counter and said he had some old hundred dollar bills that he wanted me to take a look at. He raised his fist up and opened it up quickly, dropping the contents onto the counter. I looked down and saw two very crumpled up and very dirty 100 dollar bills. I don't mean dirty like they were in his hand for any length of time and soaked with sweat and grime. I don't mean dirty like they were acquired in an illegal manner. I mean dirty like they had been rolled around in the dirt and stepped on. They were bills from two series ago. Not the ones we used to have before the current design that no one will accept any more. I am talking the series before those. So if you are over 30 years old, you probably have seen them when you were very young. I said that we only accepted the new style hundreds and we wouldn't be able to take them. He said, "phhh, whatever," turned around and walked out. I am still puzzled as to whether he wanted to just trade them in for change like 20's, 50's or new 100's, or if he wanted to sell them for a higher amount because they were old. Man, they were beat up. Also, the reason why they keep changing the design is because the most commonly counterfeited bill is an old 100. Strange.