You can get non-ES for about the same.

FWIW, I bought two of the non-ES from these guys, and they have been running great for a couple of months now.

https://www.ebay.com/itm/CM806600203...R/264173228479

I put them on a Chinese knock-off CPU, and it too is working just fine.

https://www.ebay.com/itm/X99-Dual-CP...UAAOSwa8JfybbJ

28/56 cruncher with AVX2, for ~$500 (I already had the rest of the parts).