In the olden days "used" was not "vintage" unless you where talking guitars.
Daddy's Junky Music had a monthly catalog and if you saw something you wanted you probably called using a device called a telephone and spoke to Hirsh. You asked him whether it was still available and if it was you bought it.
The great thing about Daddy's was that if you had a band or owned a studio (which also was a different thing in those days) you could outfit your racks with more processing power, buy extra drum hardware and put together a good PA system for very little money.
At some point Daddy's opened more stores and stopped their "Used Gear By Mail" catalog and business. My memory was that there just was less used gear hitting the market and Ebay had probably had a negative effect as well. I know I was sad. I think the last item I bought was a huge Vox bass cabinet which I paired with a fawn AC-30 and made much happy noises.
Today as I was doing a search for road cases and I hit Daddy's site and much to my great joy, they are back in the mail order business. Touring bands to garage bands can rejoice and afford play.