Hard to find mercanti signed, bridge, first day, 70 s, flawless!!!!!!! From congratulations set!
Cert numbers will vary
These 2017-S Silver Eagles only have a total mintage of 125,000 (with the Congratulations Set representing 75,000 of that total). The only regular strike proof silver eagle with a lower mintage is the 1995-W, with a mintage of approx. 30,000.  nowadays, A proof 70 1995-W, cost around $20,000 so I believe the 2017's will appreciate in value drastically over time as well.