Latest King purchase was
The Dark Tower (Book VII) in trade paperback. Before that, it was the first six books in the series, at the rate of one or two a month this year. I'd read them back in 2005 when I was stationed overseas, buying them all at the PX in small paperback form, but I gave them away before I came back to the States. Only so much weight allowed in my luggage, y'know. So I'm glad to have my series intact again at last.
I dunno if this counts as a King-related purchase, but for some unfathomable reason I ordered these from EBay: ten tiny (dollhouse-size) replicas of King novels. They came today, each about the size of my thumbnail. I have no idea why I wanted them, and no idea why they crack me up every time I look at them...but I did and they do, so I'm happy with them!