Adorama has the Canon EF 24-105mm f/4L IS for $859 shipped.

(Compare to $1149 new or $919 + shipping for refurbed from Canon USA).

Per Adorama:

Refurbished goods sold by Adorama are all refurbished by the manufacturer (unless specified otherwise) to the original company's specifications. All Canon refurbished products from Adorama come with a 1 year return-to-Adorama warranty.