When changing the 3200GT for a GS I went up to Aberdeen to view/drive a black GS. Had it out on the road for half an hour or so, then had a good poke around - took the owner's sports bag out, lifted the boot tray cover and no kidding, 6 inches of water in the spare wheel well.
His face, he had no idea.
The GS was a bit too black, and a bit tatty, however this 'sealed' it's fate as it were.