I found a local shop which sells refurbished and recertified HDDs for a really good price. Some are refurbished, some are recertified, it’s not both at the same time.
Do you have any experience with them? The shop gives a standard one year warranty with them.
1/3 of my refurbished drives died early. It tested fine before I put it in my raid array, but about 3 months in I was getting error after error. I swapped it with my spare and they’ve been fine so far.