I'm very much surprised about the amount of comments here on HN (today and in many previous discussions) that claim to reuse IKEA furniture; it's completely contrary to my experience. My opinion of IKEA furniture is that it's single-assembly - trying to break it apart irreparably destroys it.
I conclude there must be either high variance in IKEA's production quality, or we're comparing apples to oranges. Maybe some IKEA products have more reassembly potential than others. Someone mentioned an office chair elsewhere in the thread - yeah, that obviously can last years and be moved, because it's made of metal and hard plastics. But most IKEA furniture I experienced is made of dried toilet paper glued with formaldehyde^W^W^W^W^W^Wmedium-density fibreboard and assembles destructively.