I have been an avid collector for over 50 years.  Now that I am 70, I am being encouraged to sell off my collections so our son won't be overwhelmed with all my stuff.  Lately my wife will just go through the house or garage and pick something up and say "Look this up and see if it is worth anything.  Put it on eBay."

This is one (1),  Allied Series No. 255 High Fidelity Recording Tape.  It is new-old-stock and factory sealed.  I used to do a lot of recording back in the "old days".  This tape dates to 1969.