I paid $1500 for my dog from LA to Heathrow 5 years ago. The original quote was around $800. They didn't like the size of the crate I originally used, so it cost me almost twice as much as budgeted, plus another $200 for the new crate. They said because my Abbey wouldn't stand up, it was too small for her. I love my dog to bits, and I know the crate was plenty big, but Virgin says they are very careful about crate sizes, because if Defra decides the crate is too small when the animal arrives in the UK, the airline gets the fine and after X number of infractions (can't remember the number, but it is something pretty low, like 2 or 3) they can take away the ability for the airline to carry animals on that route.
I could argue that they are over safe, because then they can charge more...but that would mean I am being cynical!

So, long way to get to my answer...that price sounds very typical.