Amazon offers the Canon EF 28mm f/1.8 Wide Angle USM Lens, model no. 2510A003, for $389 with free shipping. Plus, receive 2% back in Amazon Rewards, or a credit of $7.78. Even before factoring in the credit, that's tied with our mention from two days ago (although Amazon Rewards were not included in that deal) and the lowest total price we could find by $60. It features a 12" minimum focusing distance, 58mm filter size, and front and rear lens caps.
Of note, 35 days after shipment, your Amazon Rewards will convert into a promotional code that is automatically applied to your account and can be used on any item that is shipped and sold by Amazon.