Digital photography

Buying used lenses from ebay etc. - too risky? what do we think? I'm after a canon 70-200 f4 L and they seem to be pretty good value new anyway but i have limited experience in buying lenses second hand. Cheers

Check out MPB for secondhand with warranty. Have used and they are reliable
Talkphotography is a good forum, excellent classifieds section, but you need to be a member for a while with a number of posts to access it