Powertool prices fluctuate so much you may not be getting an actual deal when BF shows up.
I am more interested in getting decent hand tools dirt cheap, that seems to happen much more often.
Also sometimes non-tool electronics like vacuums or pre-lit trees. One year they had a decent 6 footer with lights for like 20 bucks or so. Another year they had really damn good shop vacs for a quarter the normal price.
Sometimes they have good flashlights on sale as well, but PSA: Ignore those dollar flashlights, they die too easily.
Unless you need good batteries, those have actually lasted a lot longer. You can get one of those multipacks of Brinks flashlights that include like maybe 9 AAA's for much cheaper than a pack of AAA's.