Never throw away a dear old friend 
I replaced it 4 years ago by two 40D s because the trigger button failed - I resolved the issue a few months ago with isopropanole after web based instructions and it worked. I will (never ?) give it away except to someone who will use (and love) it. It was my re-entry into real photography in 2005: with the great EF-S 60mm Macro.
Now it might be reused for
* high resolution time lapse
* as fourth body if I do not want change lenses
* for projects where I would like to leave the camera position untouched
For you it might serve as 1.6x tele converter. Shure, the sensor crop of a new full frame will have a little better IQ especially at high ISO values. But: File size is much smaller and this might help for stray and pray situations where you shoot a lot of frames but only a few are good.
Avoid lens changes if you have shooting situations where a FF and a CROP body combine to a great combo - for me it will be the situation 10-22 on crop for overview shots and the 100mm Macro on FF for detail photographs.
And, as others said: It is a valuable backup body.
Best - Michael
I replaced it 4 years ago by two 40D s because the trigger button failed - I resolved the issue a few months ago with isopropanole after web based instructions and it worked. I will (never ?) give it away except to someone who will use (and love) it. It was my re-entry into real photography in 2005: with the great EF-S 60mm Macro.
Now it might be reused for
* high resolution time lapse
* as fourth body if I do not want change lenses
* for projects where I would like to leave the camera position untouched
For you it might serve as 1.6x tele converter. Shure, the sensor crop of a new full frame will have a little better IQ especially at high ISO values. But: File size is much smaller and this might help for stray and pray situations where you shoot a lot of frames but only a few are good.
Avoid lens changes if you have shooting situations where a FF and a CROP body combine to a great combo - for me it will be the situation 10-22 on crop for overview shots and the 100mm Macro on FF for detail photographs.
And, as others said: It is a valuable backup body.
Best - Michael
Upvote
0