ebay (via 6ave) has the Canon EF 24-105mm f/4L IS USM lens for $639.99 (reg. $1149). Check it out here on ebay.
Note, this is likely a grey market item with an in-house warranty from 6ave, which has a positive feedback rating of 99.3%.
[UPDATE: These are all gone now at the deal price now. It's back to $1149.]