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.
Yes I have and it’s good, but I don’t think anecdotal evidence matters. I may have been lucky or you might be unlucky.
Personally I always buy multiple refurbished drives and put them in a raid in such a way that they can fail without fucking me over. For a minimal setup, mirror and throw big fat errors with sound when one is down or has smart errors or bad blocks.