@sokogear , I think that the equipment hoarder is a very rare beast when compared to the hoarders of the physical music media (albums, cassettes, CD's). Some of the things that perplex me about the music hoarders are:
1) How do you find the space for all of that music?
2) How do you find the time to listen all of that music?
3) How can you ignore the importance of the equipment to better enjoy all of that music?
I too have re-bought many albums that I regretted selling as my musical tastes either changed; or, more likely circled back to where they used to be. Fortunately, in some of those cases, I've managed to find some remastered copies that were better than the original (sometimes drastically better). On that subject (and current forum thread), I'm really looking forward to hearing from my friends about what they think of the newest Joni Mitchell remasters (Asylum Years). Funny thing is, the "hoarder" group of friends will probably be the first ones to buy those.