Do you regularly sell games or perhaps are you thinking about parting with some?

Updated (June 3rd, 2017...who updates a 5 year blog post...?):

No regrets. In fact, I've come to the realization that I'm going to sell more games. I'll keep the classics, but the ones I haven't touched in years are being wasted just sitting on my shelf. Recently sold:

Bayonetta 2 (not sure why I had this game, didn't like the first, never touched this one)

MKX (I have MKXL so this seemed pointless to keep)

Prinny (haven't touched a PSP in 5+ years)

MGS Gameboy (Cool collection piece, never played)

FFVII (Never played)

Conker's Bad Fur Day (I remember buying this for about $35 5 years ago, sold it for $70)

Conker Live and Reloaded (Never Played)

Banjo Kazooie (never played)

Resident Evil Outbreak #1 and #2 (also Code Veronica X) (I like RE, but never will play these games)

FFXV, Blodbourne, Uncharted 4, Black Ops 3, Resident Evil Origins, GTA V, Mario Maker, Watch_Dogs, Quantum Break (cool games, but haven't even been in my collection long enough for me to care about them)