I had pre-odered Homefront: Resist Edition (Steelbook) from Amazon about a month ago for 25 pounds (GBP), which calculates to roughly $40 USD.
Amazon by far has the best prices on new releases and the occasional pre-order.
Yeah, Amazon's something else on these PC downloads for new releases, of late.
It's like they wanna compete w/ Steam and retail.
Right now for PC downloads...
DA2 PC = $41;
Shogun 2: Total War = $40;
and of course the Homefront PC = $47; with a $15 video game coupon for next purchase (retail or DL).
EDIT:
I should note, I seem to also buy lots of music to download from Amazon for download, as well. As they beat most places by about half-price or better, on their monthly $5 sales for select albums or their daily $3.99 or less sales.