Heya,
Why would you buy them, then ask if you got ripped off?
They go for $99 new, shipped. If you get them from headphones.com with a discount (15%), it's $75 shipped. You got it for a few bucks less even. Good for you.
You paid less than retail.
If used, they usually go around $60~65.
So if you got them used, you paid about the right amount. If you got them new, good for you, good price.
Very best,