Best Buy offers the Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM Lens for Pentax or Sigma for $149.99. Pay with Visa Checkout to drop the price to $124.99. With free shipping, that's $89 under our mention from earlier today and by far the best deal we've seen. (It's also the lowest total price we could find today by $89, although most merchants charge $301 or more.) It features image stabilization, 62mm filters, and 2.9x optical zoom.
Note: The Visa Checkout offer can only be used once per account.