@GoldFinger1969, that 68PPQ is a beaut (and a * as a bonus)! My own 57B is a 64PPQ like the OP's example that I picked up a while back. @meandyou4ever0, go ahead and try to pick up the 57 and the 57A and complete the trio set! If you can find them both in 64PPQ from PCGS, it would make a nice display.
I have a bunch of 1957's and 1957-B's....my understanding is without a super-high grade, they're not worth much over FV ? There were so many bills printed from the 1920's onward...and so many saved...that unless you are in the high-60's (excluding low SN, unique block or other rare variable)....just no price above FV. Dealers have told me they don't want many of these super-printed bills even at FV...they say just spend it. One of the big differences between bills and coins....the much larger volumes for the former than the latter.
@philologus_1 thank you for the great info on the 1957 one dollar bill. I have one, given to me by a very dear friend. It's 10 years behind my birth year, but it is my wife's birth year. It's uncirculated and the "A" Series.