Northern Tool has a promotion on Milwaukee tools where you can a free battery with several tool purchases, including this fan. Seems like a good price since the fan by itself is currently on sale at HD for $69 without a battery.
If you are looking for both, tool-only, this is close to the going rate for "open box/like new" on eBay/FB Marketplace/OfferUp/Craigslist. The added benefit being you are buying from an authorized dealer and shouldn't have any issues with warranty
I have the 1/2" Stubby Impact and it is a BEAST with a 6AH battery.