Should I get a newer model at a more expensive price or an older model at a lower price?
If you are beginner I would suggest get cheaper one for learning. Invest your money for good lens which more important than camera body. When you are ready to upgrade then get a higher level camera and use it with your stock lens.
But if you don't plan to upgrade, get newest model would be better.
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Should I get a newer model at a more expensive price or an older model at a lower price?
Depends on the used canon model. The t1i, 30D, 40D, eos 1 mIII, and 5d are great outdated models used....
anything else is crap. Ive used canon long enough to know what works and what doesn't. Nikon's tend to last longer over time so you will find more used in great condition than canon. Still a camera like the 40D is both solid and a fantastic model to use as well as a pleasure to shoot with...
I would suggest to get a cheaper dslr and make a good collection of lenses than later on if you feel that you are good enough than you might upgrade
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