A body disc brakes

If you separate the caliper adapters from the spindles and remove the ball joints from the UCAs, spindles, adapters and UCAs will fit in a large flat rate box - about $15 to ship anywhere in the US. If you have to ship the rotors and calipers, they will fit in another large flat rate box (although they might be just cores -new/rebuilt are available just about anyplace).

I agree on them fitting in a large flat rate box. It's easy. And it would help you sell the part, and the other guy would be able to get the parts he needs too. :)