Save $1 and 5 Euro Banknotes

Hello hope everyone is safe. I save American $1 and European 5 Euro Banknotes. I save by first and second letter on serial number. Was saving 10's and 20's but wife said no. So if anyone has any they would like to swap for notes and/or coins be sure to let me Know. Things are kind of quite these last few months but things are starting to look better. Thanks and have a nice day and stay safe.