Re that milwaukee stuff - a couple months ago a lot of Milwaukee tools went on clearance at some stores while remaining full price at others.
I think what you see in the pic of the penny SDS drill is a store that never stocked it. If you went to a store that normally stocks it, it would show up as full price (like metalart is seeing)
I have a feeling it was an attempt at making sure stores that shouldnt be carrying it clear out their inventory. Around me, the only stores that have the heavier duty tools (think cordless bandsaw, cordless SDS drills, etc) are the busier stores that get a ton of contractor traffic, and those items are full price.
The smaller stores that are closer to me never stocked those items and they are also clearanced/pennied out in the system. I was never able to find any of them at those stores (I did get a corded one for a penny, it looked like it was returned, probably after being purchased at one of the bigger stores)