Beach Camera via eBay offers the factory-refurbished Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM Lens for Nikon, model no. 883-101, Canon, model no. 883-101, Sony, model no. 883-205, or Pentax, model no. 883, for $249.99 with free shipping. That's $50 below the best price we could find for a new unit, although we saw a refurb for a buck less three weeks ago. It features a minimum aperture of f/22 and seven diaphragm blades. A 4-year Sigma warranty applies.