you can now "Bundle" American Eagle Silver Proof Coins (2016 – 2017) https://catalog.usmint.gov/american...BNDL_AMEREAGLE.html?cgid=silver-coins#start=1 Wow ain't that great
I guess there's a bit of inventory overhang of the 2016 with the lettered edge. NOT "Proof" as far as I can see, but it is just an illustration, I guess.
One of the great ironies is unlimited mintage often sells fewer than those with mintage limits. It's no longer a ceiling, but a floor.
Truth. Makes it seem cheap and a lot of people lose interest expecting the after market to be cheaper in the near future