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Yes, it is a real coin and a nice example. Many ancient coins are in very good condition.
Unfortunately you paid too much for it. Ilya Zlobin ( highrating_lowprice ) is notorious for his high prices. His standard tactic is to put a ridiculously high price on a coin and then take a little lower price, so that the inexperienced buyer thinks he is getting a deal.
Pricing coins is subjective though, I would not price this coin for more than $75...probably quite a bit less.
David Sear, in Roman Coins and Their Values vol III, prices a similar coin (from a different mint) for $55 in extremely fine condition.
Everybody overpays sometimes, I still do myself. Don't let it discourage you from enjoying ancient numismatics...the positives outweigh the negatives.