It's 2 generations behind, so there will be less out there being used. It's finding a second wind with ML's RAW video hack, but you still need an external recorder (which most serious video shooters have anyways), so it won't get widespread acceptance again.
That said, I still miss mine. It basically represented Canon's excessiveness before the financial crashes starting in 08. Build quality was second to none on a crop shooter at the time. It's still almost twice as fast as my current 6D, which I do miss when I shoot the very little sports I do. I plan on getting a 7D as a backup eventually, but the 50D is still quite a capable camera.
Fuji X-E2 | 18-55 | 23 | Nikon 60mm AF-D Macro | 55-250 |YN-560EXIIx2 | YN-565EX | YN-622C | YN-622C-TX