Need Advice on 18TB IronWolf Pro Drives – Odd Pricing Situation at Newegg!

I'm planning to add a few 18TB IronWolf Pro drives to my array, and I've noticed some peculiar pricing on Newegg's current sale. The pricing for other size drives seems off too. Anyone else experiencing this? I'm considering recertified drives from Server Part Deals on Black Friday but also eyeing some new ones. Strangely, 20TB drives are similarly priced. Ideally, I'd stick to the same capacity, but I'd love to hear your thoughts. Canadian dollars before tax, just to clear up any confusion. Thanks!