Space is a major issue in a small London flat (apartment). There was no more room on the shelves, the floor or in the storage cupboard in the kitchen! 100 went and I have to say it was really quite easy to prune that many. I have a tendency to buy lots of albums by an artist when I first get into them, I trimmed a few that were over-represented and also some that i just don't listen to or were unlikely to. I'd never really enjoyed the Hemphill since buying it on release, I'm left with enough by him still to enjoy.
I found the exercise pretty liberating and had a very pleasant selling experience - I wasn't looking for lots of money just the space. I'm already considering titles for the next hundred.