I never owned a complete 500.. but I've got a couple of old motherboards stashed for spare parts... I did see one at the Salvation Army store last week... standing out among all those 286-386-486 class machines.
My 2000s are collecting dust... but they got some company today. One of my old customers called me & said to come over and pick it up... So I got a 2000HD and a 1000 for the collection.... 3 A2000s, 3A1000s..
The most recent use is porting those old floppy disks to CDs.