The MD-80 fleets rapidly disappeared from passenger service, but they did find a small secondary life as freighter conversions. The majority of freighter conversion activity has been around the 737 and more recently A320/321 families and the MD-80s have not been widespread. They seem to be popular with operators that already were using DC-9 freighters so maybe the transition is easier to manage. USA Jet is one that has picked up the type. When I saw one was at Paine Field, I figured I would try and catch it departing. Sadly, the conditions were far from ideal. It was a gloomy and rainy day but I went for it anyway. New there was little likelihood I would see one again.