Upload & Sell: On
The flip LCD is very useful, and that one reason I haven't sold it yet.
The T3i is also the only camera with the beautiful 3x and 10x "crop" mode for video.
If you use/need that feature, it is definitely worth keeping the body just for that. Versus coming up with a 3,200 mm zoom lens for video (200 mm x 1.6 x 10.) Dang, now I want that body back just to test that video "super zoom" mode!
(Note: That is not just the normal, very poor quality "lossy" digital zoom. The way the T3i down-samples from the sensor, you get regular 1080p video from a small area of the sensor.)