Hehe spent too long writing an answer and ChrisKuhnshas a good point, but depends on the requirement - sure you can get controllers that are on the vSAN HCL for under $200 but if you want a decent queue depth you will likely have to spend 2-3 times that (unless getting refurb).
Thus the ask of the set-up really determines what can or cannot be used or what will work best for it at least.