I have made a list of over 300 Concerts I visited from 1969 to now as far as I remember or had ticket stubs available. It was a broad range of musical directions as my CD collection was (not only the stuff I was collecting more serious). It was classic, modern jazz, pop, rock, avant-garde and things between.
What about trading and the disappeared collectors lists?
Most trading was now done using file sharing networks on the internet.
I use often the ones of: Zappateers, dime, tradersden
The time of tape trading or even CDR/DVD trading is over now for the most cases.
If there was a special interest in my huge music + music video + interview collection I might be contacted through email (see main page) and we will see if we can work something out.