I understand the frustration; almost nowhere does agile “right”. However, this is a gross misrepresentation of the philosophy.
Specifically it leaves out and ignores this very important part:
That is, while there is value in the items on the right, we value the items on the left more.
As seen on agilemanifesto.org
The base philosophy is meant to remind us what we are here to do: make software (or whatever project we’re working on), not become dogmatic about processes or tools or get bogged down in peripheral documentation.
There’s a lot of comments talking about used and refurbs. I personally use these types to get good deals but I also have a reasonably robust backup protocol. Not a full 321 backup but an appropriate level of risk for my needs.
My point being, if you go that route, they’re cheaper but the odds that one dies on you might be higher. Make sure you manage your backup strategy to a risk value you’re comfortable with.
That said, I’ve also had great experiences with serverpartdeals. I’ve also used diskprices.com to find deals.
Things to consider are noise, temps, power-on time, etc. For myself, temps are fairly consistent in my case and it’s in a closet so I don’t care about noise. I also don’t need particularly fast access on the HDDs (I use an nvme cache strategy as well) so I can pretty much use whatever. Your needs might differ.