Buying a second hand lens

[Rexxar]

I've been looking lately at the Sigma 70-200 f2.8 but have seen a Canon 70-200 f4 L for £450...£150 less than the Sigma, albeit a stop slower....


Question is... Would/Have you bought a lens second hand, either private or from a Store, and your opinion on this and experiences...

Should I just buy new or is second hand the way to go?

 

[Rexxar]

Should have said, comes with a tripod collar which is usually over £100, gave read really bad reviews on the 3rd party ones...

Seeing as the Sigma needs stopping down to f4 for full sharpness, thought I may as well go for an L...

 

[Rexxar]

Cheers guys,

Anyone got any experience of simply electronics?