(+some ebay ethics)
Base on a lot of the postings here, I've concluded that "ebay ethics" is an oxymoron. Time after time there are complaints that what someone bought was; defective, broken, damaged, the wrong item, the wrong size, not as described, etc., etc.
For $30 for both hubs I'd use the rear and salvage the cones, axle and seals from the front. That assumes, of course, that the hub internals are in useable condition. They may not be.