Arlo security lights Best Buy deal 3 for 99.00

I’m a big fan of the Arlo ecosystem and noticed today only Best Buy deal of the day has the light at 99.00 (which is already 50.00 off) and get 2 free lights. Add 1 to cart and 3 will show up at checkout. Also, when I checked at noonish they were sold out but at 4 they were in stock and I check out so keep checking