Disc Brake System

If you leave the rotors out, and disassemble the caliper brackets and lower ball joints from the spindles, you can probably get all of that stuff into two large flat rate boxes without exceeding the weight limits, which should ship for around $53. Even if it took 3 it would be under $80, and honestly 2 should work.

Just an FYI if it helps with your sale. I've shipped spindles that way before, it takes a little finagling to get them arranged in the box but it does work.