If you look on the tags, if the item is a legit clearance blowout there will be a small "n" underneath the model / sku / etc. N means non-stock which it will not be replaced.
Awesome garage... saw this post and couldnt help but comment. I use a demo hammer with an attachment to drive ground rods. Regardless of soil conditions, takes a minute or two without any physical labor.
http://www.amazon.com/dp/B00004RHFC/?tag=atomicindus08-20