When I ripped all my CD's and LP's to a hard-drive I never took the time to enter in all the meta data telling me the what versions, etc; I had. Tons of excellent info now lost forever. 
Not having 20/20 hindsight and seeing the value of many of the LP's I sold for peanuts.
Can't repeat a lot here
Not having 20/20 hindsight and seeing the value of many of the LP's I sold for peanuts.

Can't repeat a lot here