If you are talking about the Sigma 17-50 F2.8 I actually bought it on eBay from Japan on december 2015, the shipping was fast, the lens is PERFECT, new, in its box, I paid 300 dlls. Is SUPER sharp, super quiet, a really step up (I'm selling mi DA 35mm 2.4 actually, I see no use from it anymore since this is the same even better quality)
It came with a hand written letter from the seller thanking me from my business and they even send me a "gift" hahah a very nice pair of chopsticks.
From my experience, DO IT. You won't regret.
I searched, this is the seller I bought it from
Brand New Sigma 17 50 mm F2 8 EX DC HSM Lens for Pentax Mount APS C Size | eBay
EDIT: Oh I just read you already did. Enjoy then!
cheers.
Last edited by Bringass; 09-04-2015 at 11:55 AM.