I think I can beat 1¢ for a set. In the same way that a midrange or luxury car can beat baying $5 for a Yugo. Price is not everything.
I am a new content provider, and I charge a premium for my content. I also produce distinctive content that is within a niche, but stands out. Considering that most of my sets have not sold at all yet, that only a few have sold once or twice, and that I won't sell sets an unlimited number of times, this means that I can offer very fresh content.
I wonder how many people will end up with a set that costs one cent... If, of course, it really costs one cent. (My guess is most such offers are buy nine get one free sorts of things.)