I had no problems getting $400.00 for mine. I had three different people from this forum offering $375.00. They were brand new condition, that might have something to do with it. Don't bother with e-bay, I had over 30 offers for mine right here.
I paid 400 to headingnorth and got a great deal. they didnt even look like they were ever used. I know they go somewhere in the ballpark of around 400 each new from the dealership.. If they are in as good of condition as the ones headingnorth gave me, getting 400 should be no problem what so ever