Keep it ... it will serve as a back up lens ... also, as you said that by selling it "you won't make much on it anyway" ... besides if/when you want to do some video in low light (at that focal length) it will come in really handy. Over a period of 6 years I had three Canon 50 f/1.8 lenses, the only reason I don't have any of them now is coz I gave them away as a "free gift bundle" to "enhance" the sale of my Canon 400D, 500D & 7D. So keep it, if for nothing else one day it will come in handy when you want to sell some of your other gear.
Might also be a good lens to take to the beach.
I still have my 50D & 28-135 kit lens. Couldn't get that much for it (not enough for a small L lens) and thought if I took a trip it would be a good backup body just in case.
« Last Edit: March 02, 2013, 08:01:52 AM by Jim K »
EOS: 7D (2, 1 gripped), 50D gripped, 580EX II + CP-E4
EF: 500 f/4L IS, 100-400 L IS, 70-200 f/4L IS, 28-135 IS, 1.4x TC II, EF-S: 15-85 IS, 10-22
5D3, 17-40 L, 24-105 L, 24mm TS-E II. S100 p&s