Free G.I. Joe Sigma 6 Ultimate Duke with $20 purchase at Toys 'R' Us

In this week's edition of the Toys 'R' Us newspaper ad, they are offering a free 8" G.I. Joe Sigma 6 Ultimate Duke action figure (regularly priced at $19.99) with any G.I. Joe purchase of $19.99 or more.
Offer is good thru October 18, and is also available online at their website.