That is a beautiful coin! However, I'd recommend asking the mods if they'll move this to world coins for you; we all have our own personal specialties, and some of the people there will be able to pinpoint this for you better than, say, someone who collects modern American coins.
As for its value, I'll explain the best I can before sending you off to the world coins-ers: coins have something called "grade," which means how close they look to their original state. In the US these are on a 70-point scale, with 01 being the lowest and 70 being the rare, sought-after highest that not even all brand-new strikes attain. The grades are separated into classes: Poor, About Good, Good, Very Good, [Almost Fine], Fine, [Very Fine], Extremely Fine, Almost/About Uncirculated, Uncirculated, Mint State. (The classes in brackets are descriptors I've seen, but I'm not completely sure they actually fit on the scale.) Because coins don't stay in that top Mint State, MS bracket for long, they're worth more in that state; for example, I have an
Indian Head cent in VF worth about two dollars; if it was in MS-64, it'd be worth $119. It's very likely that the discrepancy in the pricing on your coin has to do with where different coins fall on the scale.
And,
