Twice, sort of... Sold my 83SC to a good friend when I got a boxster (hey, at the time it felt right). Bought it back...backdated it, resold it later to the same guy.. It came back again recently but this time on loan/storage. I don't miss it per se, but it still feels like an old pair of jeans. I could not stall that car if I tried.
The car is unkillable, 240K miles and counting.