On Day 7 of its 12 Days of Deals promotion, Microsoft is offering a $25 gift code with the purchase of select Xbox controllers.
You can find the relatively short list of controllers included in this deal on the Microsoft Store website. The usual caveats (today only, US only, etc.) apply, but this is one of the weaker deals, I guess.
Among the offers are:
Note that a number of Xbox hardware accessories and games are on sale, too, though I don’t think these prices are today-only. Nothing dramatic.