I just bought all the epubs I didn't already have. Not sure to be embarrassed about how many that is, or how few, so I'll not post the actual number.

But at this price I couldn't resist. They're like candy; as long as you pace yourself there's never too much.
Maybe next year they'll have the sale again, and there will be more titles available. They appear to be getting them into ebook form at a slow but steady rate.