When I tell people that I collect antique computers, their first reaction is to laugh at the idea that a computer could be antique.  I remind them that a car only needs to be 25 years old to be considered antique.  The next thing they say is that they have an old machine that I can have.  Their "old" machine is rarely old enough to qualify for my museum.  With a few exceptions, my collection ends in 1984 with the original Apple Macintosh.  Anything newer than that is just not historically significant.

If you would like to donate a machine to my museum, let me know.  I will gladly accept any pre-1984 machine I don't already have.  There are still some gaps to be filled!