That looks about right. I remember when my wife and I went to a "5 star" restaurant for our anniversary. Koby beef was the "headliner" of our multi course meal so I was excited, until they brought it out and it was a tiny little cube of beef. Really good beef, but not $100 worth.
I wouldn't ever buy Kobe beef in America. It might be true Kobe, but the truth is that the amount of Kobe beef exported from Japan is so small that it's most likely a very high grade of beef that's imitating as Kobe, complete with a hefty price markup.
It's similar to how some restaurants will substitute the high-dollar fish on the menu with cheaper ones to make more profit.
Edit: Unless you're actually in Japan, then yeah, that price does make sense. lol