Now the checkers are controlled by others.

You can also send your notes to me and then you get them with a certificate back.
I would like to have hundred dollar charge per bill.
For this fee you get a neutral grading from Europe and your bill can recover here.
I drive the banknote in the Black Forest so that the bill remain substantially healthy and a nice Sticker I can give for a extra fee.
But very important is the certificate:
I would provided this certificate with an original hand wax seal.
I live in Europe and have I to rely on the Internet for purchase.
You live in the U.S., as you can still drive on Money shows and socialize.
Manipulations are almost always recognizable.
US paper money tells everything, You just have too look exactly.
Close your eyes feel the paper and sniff...
No one can better judge bills like you.
This is just my humble opinion.
Sorry for my bad English.