Well you can get a new 50d off newegg for $1250+Shipping, and then the lens is another $600 or so... So if you bought new your looking at prob $1800-1900 after tax, So that's about $300-400 to buy used, Something to look at is, is this lens a lens you really want? if not would you rather buy the body with kit lens and buy a lens you really want, and also how used is the body, how was it treated and so on.