Barnes and Noble and some other B&M bookstores stock a couple of UK Xbox magazines, Xbox Gamer and XBM. They usually only get a copy or two of each, and they are usually a month or 2 old.

Anyway, the 'current' issue of Xbox Gamer comes polybagged with the full Prima Strategy Guide for Splinter Cell. The mag was 7.99. I compared the free guide to one in the bookstore and it is exactly the same, exact for 'promo' on the back instead of the usual 14.99 price, and a slightly less sturdy cardstock for the covers.