Short answer: not this week.
Seriously, though... I do buy multiple formats of the same book sometimes. Moving from house to house over the years was enough to motivate me to purge some of my physical books in favor of ebooks, and in the past few years I've gotten really diligent about checking out books I want to read from the library instead of just blithely buying them as I once would have done - but if I love the book and think I'll read it again, THEN I'll buy a copy (usually hardcover). And I often own an audiobook version of favorites as well as the paper version. I'm aware, though, of being highly compulsive about buying books in any format, though, so it's become a goal to cut that out. Not easy.