Good deal on the 1991. The 2018, in my opinion, is a $19-20 coin in an $18 holder. I am not trying to disparage you, as you may collect whatever makes you happy, but considering the 2018 is a currently available bullion coin (the official collector's version was just released on Thursday), and you are on a tight budget, I would have passed on the slabbed bullion. Again, collect what you like. It's your money and your happiness. I am just noting what I see in the Silver Eagle category and how I approach them. There are threads on Coin Talk that discuss this, feel free to read them for other's opinion on these. P.S. - When I started collecting Silver Eagles, I made the 'mistake' of purchasing them in slabs. Also, I have a slightly different view on Gold Eagles, which is that a coin graded by PCGS or NGC close to spot price would be what I would purchase, as it would give myself and the person that I or my heirs will sell it to, some assurance of authenticity.
The one I'm most proud of is this 82D Large Date Copper that was in a bulk lot at an estate sale. This was in a set for the Denver Mint for the year. Every angle shows a different spectrum of colors along with being a one sided woodie. With everything that was included in the lot, this worked out to about 49 cents.
Nothing. It's the holder. Short-lived PCGS doily holder. They are popular and known for holding conservatively graded coins.
Let's just say that if he wanted to sell it, he could put a 1 in front of the price he paid. That holder is very collectible.