I just bought a used Sigma 10-20 lens from ozziepuppy (Marci) today- great seller and awesome communication. She went out of her way to email me when she shipped the lens, with all the full details of the shipment. Great price, and the lens arrived packaged very well and in great shape.
I would not hesitate to buy again from her, and I'd be glad to recommend her as a seller again. Ozziepuppy is a great POTN member!