The BlackBerry KEYone Black Edition hasn't had many discounts since release, but the folks at Best Buy have now added it to their clearance sale and have it reduced to $300 from the regular $500. As a reminder, the BlackBerry KEYone Black Edition comes unlocked with the Qualcomm Snapdragon 625 processor but adds 4GB of RAM and ups the internal storage to 64GB instead of the base 3GB and 32GB found on the silver KEYone.
If you're planning on picking one up, might want to act fast. Last time there were priced this low, Amazon blew through their stock pretty quick and now all they have left at similar pricing is the International Limited Edition black. If you actually prefer the silver KEYone, that's currently available on Amazon as well for $275 USD.