...Kudos on your sharp, clear photos ... That being said, this is another bullion coin ... not worth slabbing (IMHO) ... rather, put it in a PVC-free coin flip, either paper or plastic ... my preference is the plastic flip, as you can take your coin out if you wish ...
...as a rule, most bullion coins have little premium value over spot, as, because of their purity & how they are handled at the mint, the surfaces can quickly stain & spot with age ... (silver, not gold) ...
...most are minted at volumes in the tens of millions, & are not rare. The demand for US Silver Eagles is good, & this does add some value over bullion price. How much value is up to the buyer ...