I promise you, if I showed up at my corner store with a EU50 note and said "Would you give me a gallon of milk for this" the dude would take it. He probably wo

I promise you, if I showed up at my corner store with a EU50 note and said "Would you give me a gallon of milk for this" the dude would take it. He probably wouldn't give me change, so my effective exchange rate for Euro->USD would be something like 20x reality, but you gotta pay for convenience.