Nice coin! I'm guessing that's either a -65 or a -66? The "spotting" is common, can also be referred to as "hazing" which is more common on the proof brown issues. It's probably not been dipped. As long as you're happy with the coin, and it doesn't take away from the eye appeal, you should be in good shape. Here's a couple I just picked up, heading out for PCGS submission next week:
I think you are missing the point here. Most coins are struck in a fairly narrow range of quality and for most older coins that range is quite high. People don't care as much about the quality of a specimen if it is typical quality and this tends to apply even in those cases where typical quality isn't good. But with Ikes typical quality tends to be atrocious and the range of grades is extreme. Just finding nice attractive specimens of many dates is difficult and most people don't want to collect garbage. Try finding a nice attractive '76 type I Ike. Only about 10% of mint set coins achieve this level. Very very few are Gems and some people do want moderns in Gem. The only reason these are cheap in MS-63 is that there is such a tiny demand and this cuts across the board on almost all moderns whether they are more available in well struck Gem like clad dimes or very elusive like the Ikes; the demand hardly exists so the prices are low. A handful collect at the high end and this is where the high prices are, but low prices on Gems is not indicative of a large supply but a non-existent demand. People do not much collect moderns. Beauty is in the eye of the beholder. Certainly an XF 1972 that was very poorly made and got it's wear from a few months in a casino is a remarkably ugly coin to my eye. Nothing will ever fix it. I don't collect this coin though. I collect these in Gem with nice strikes and nice surfaces and fully lustrous. These coins are beautiful to me. Each coin is unique and every series is unique. Ikes had a different set of production problem than any other coins. In most ways it is one of the most difficult coins to find in Gem because so few nice ones were made. Well struck Gem nickels are actually a little more difficult but the reasons for them being more difficult are different and some of these reasons simply don't apply to Ikes.
Considering I don't pursue the purchase of Ike's, I was surprised to see I have fourteen different dates and mints in my inventory. I only remember buying three or four of these. Now I'm hoping they increase over time as well. That was a pleasant shocker! :>) I did vote for him in that election, so "I Like Ike", again holds true.