Well, it depends - gun prices can be regional.
Here in TX - I can buy one new for $495 locally at my gun store - and at a gun show, I bet I can find a new one for $475.
So, U may have paid a bit too much for a used one - how "like new" is it? Do U know the history behind it (a friend - whome you know how many rounds were fired thru it)?
But, did you pay sales tax? That's more money you saved there....