I've gone the other way, in the last 4-6 weeks I've sold over $2000 worth of lights. Mostly Surefires, a few ARC's, and some other misc lights. Lost money on some, made money on some.
My original plan was to buy a bunch of lights, use them for a year or two, and see which ones I used most often and found most useful, and sell the rest. I still have 6-8 Surefires and I may still sell a couple more yet. There is only so much overlapping of different purposes before lights start to get redundant.
I still have way more flashlights than I "need" or will ever use, but the dollar amount I have invested in my "collection" is a lot more reasonable now, and I'll actually get more use out of each light I have now comapred to before when many of them just sat on a shelf looking pretty.
-Keith