Check out our coin set selection for the very best in unique or custom, handmade pieces from our coins & money shops. Add to Favorites. U. S. Proof Set. USCoinsandCurrency. 5 out of 5 stars. All Us Mint Set Uncirculated Proof Are Sold With the Original Packaging. Packaging varies in condition, could be slightly discolored, worn, wrinkles, or folds. We make.