More than what? How much? Please quote absolute figures.
Probably not much of anything, but what are you looking to accomplish? If you like a T3 then buy one.
My 2 cents ...
I had thought I had made the pricing options clear enough in the original post. Sorry if I didn't anyways here that is again:
T3 (entry level Canon brand new) - $450 without lens
5D (Pro level Canon old and well used) - $350-$450 more than the T3 at $800-$900 used
I would think the old 5D would give better Image Quality than the T3. But as a first try for Canon (only used Nikon so far) I like the color and character of the T3 (only Canon DSLR I've actually used myself) better than my D40.
That's why I'm asking.
The 5D is a 5+ year old model. The T3 is brand new.
Are there advantages (beyond the one possibly having substantial wear) that a newer camera would have over the old 5D? I'm only concerned with IQ (not options).
to quote myself:
... Is there something good used that would be better than the T3 for around $500?
i.e. I can find 10D's for $150-200 and 20D's for $250 and probably bodies a few steps higher up for $500 used vs that price new for today's entry level Canon DSLR.