(not secondhand) i got mine from eBay, you just need to do a bit research on eBay in order to find a good seller. I buy most of my electronic item from eBay now. Buy from a seller who is local to you country, say if you thinking to buy in Singapore buy from someone who is from Singapore. Second thing buy from that seller who got lot of feedback (500+) and more than 98% Positive... before bidding on item do some research ...enjoy You can buy Sigma, Tokina and other so called third party lenses. You get what you pay for. Digital cameras are more demanding of lens quality. Reputable dealers are your best bet. Shady ones give you bargain prices but you end up being conned. | 