It's not so much a question of what you throw away when you move as it is a question of what you're using regularly. I'll be moving for work soon, and I'll be throwing away/donating/discarding quite a few things that I will then buy on the other end. It's just not economical to ship a mattress, unless you're packing things into a UHaul, and that's not the only example. I would happily rail against the concept of disposable goods, but that's not the same thing.