I had a thought that didn't die from solitude. Most of the Korber buildings use common panels, yet the panels themselves have never been offered separately (I've been outbid on a couple of auctions for loose panels). Why not list the component panels for separate sale -- not as individually packaged items, but in a parts catalog where they can be ordered and tossed into a shipping envelope for the customer. Since you need to have stacks of them lying around anyway to compile the kits it seems logical.
