If you can't find them, go with truth in advertising. Someone may be happy to buy the unit knowing the jacks are bad. They might be able to do the repair themselves or they can wait until supplies are back in stock to repair them OR they may not care if they have jacks. Price accordingly. I once sold a car that wouldn't start in the rain. I was honest about it. The construction worker that bought it didn't care. He doesn't work when it rains. The car was perfect for him.