Well, no one in the US flies DC10's anymore, save for a few charter companies, NW and HA have a bunch being chopped up. ATA still has a few L1011's for military charters, but they are very rare now. A new airline in Thailand has two of Delta's.
NW is retiring their DC9's like crazy, and HA got rid of theirs , Air Tran has dumped theirs and Midwest will soon. My old airline got rid of the 737-200.
Lots of plane types are disapearing! Even the 747-200 and -300 are rare sights.
747-300's used to be commonplace! The 747 of course was the standardbearer and workhorse of the skies for decades.