Yeah, $1800 sounds about right. I had to replace mine awhile back for $2000 (Canadian).
Weird that the black plastic bit is unscathed. If you always park it towards the curb, I can't see how anyone would have hit you/wheeled onto it. You would have heard/felt damage of that magnitude while driving. I'd hate to suggest it and I hope I'm wrong, but I suppose similar damage would be made if someone stomped down on it
