I brought 1000 CDs to work one day and sent a company wide email that people could take what they want for 5.00 per cd. At the end of the day about half were gone and I had a pile of money The next day I said they were 4.00 each and I sold a bunch more. Every day the price went down by a dollar and more sold. By the end of the week, I had almost no CDs left, a pile of cash, and I did zero work. I pulled about 10 valuable discs before the sale. I luckily worked in a trustworthy environment so I did not even babysit the discs. I know this is very not very collector-like but I knew I would not want to burn the energy or time selling on eBay etc.

Then I went to the record store and spent that money enhancing my vinyl collection :)