I'm selling a hard shell double bass case for $850. I've taken it on a few flights and several buses without any problems.
It's got a plush interior with thick padding and padded straps. The exterior is made of fiberglass and has seven folding latches and wheels on two sides for easy transport. It can be made to fit 1/2, 3/4 and 5/8 sized basses.
More pictures available upon request.
The case is in Vancouver, BC.