EngadgetHD got their hands on a leaked scan of Sunday's Best Buy circular, which reveals a Best Buy promotion giving Xbox 360 HD DVD add-on buyers a free Heroes HD DVD box set.

If genuine, this offer gives buyers of the Xbox 360 HD DVD add-on the free copy King Kong packed in the box, the five free HD DVDs from the Toshiba rebate, and the free $99 Heroes HD DVD box set. At Best Buy's price of $179 for the add-on, the $280 worth of free HD DVDs more than pay for the hardware purchase.

It's a very good deal, and if you own an Xbox 360 and have been on the fence about HD DVD, you owe it to yourself to check the Best Buy ad in your Sunday newspaper.