Unless I'm mistaken this is tied for the cheapest ever price for this CPU. Please note that it is the 10600KF variant, meaning it has no integrated GPU. I'd imagine this is a non-factor though, unless for some reason your build doesn't have a discrete graphics card.
First deal so let me know if I've done it right.
Edit: As pointed out by 8azinga, the i5 10600k (which does have an iGPU) is available as well for $319.20, also at its cheapest historical price.
Lol, can't believe I'm saying this but Intels a bargain now…