By current standards it's a bargain (see camels). It was cheaper in the first quarter of 2023 but AI data centres have been hoovering hard drives up since then and prices have jumped accordingly. The most recent deal posted for this item was $50 more than this. You can get slightly cheaper prices elsewhere on other hard drives if you're willing to roll the dice on warranty but this has the comfort of an Amazon warranty.
Looks to be a quantity / time limited deal. Will take a while to arrive from the UK also. If you look at the UK Amazon it costs $559 there, plus delivery so we are somehow getting it significantly cheaper.
And because I'm generous I'll kick things off with the traditional first comment - "That's a lot of data to loose in one hit!"
$28.50/TB
Bit of a premium, got some 16TBs for ~$12/TB but not a fair comparison as they are used with warranty.