were to buy cheap camera lenses?

well i know a few local shops where you get lens at low price but i don't think they are reliable most of the time. people mostly sell lens when there are problem in that lens. I would rather buy a new one and rely on the quality. Now a days there are good lenses available are quite affordable price. Specially from Tamron and Sigma.

Ebay is the best place to start looking for, I guess. :)

lenses are the key point of a camera . Why go for a cheap then . Try to find out who's the wholesaler in your area of your brand and go strike a deal with some reference .