I was given an old IKEA Expedit case, flat packed, that was missing screws and dowels. One of the edges was broken, while the piece was being dismantled.
Fixing the broken piece was easy. Nothing a bit of glue could not mend. As this was going to stay in my workshop, I didn’t try to make it nice in any way.
Reusing furniture makes sense. In general IKEA pieces don’t age well. Before throwing it away it makes sense to consider reusing it in a different room/function. If you have to throw it away, it’s always a good idea to salvage screws and other IKEA parts, for future projects.