Well, the websites for these products don't show prices, just "request quote" ... not a good sign for low prices.
All I can find is prices from $6,000.00 for a low power one (200W or so?) on Alibaba to around $50,000.00 for a 1kW model. The 10kW+ ones... looking at $250K and up, I think. And the higher the power the bigger the power unit and requirements for AC power and cooling water.
I can barely imagine the OSHA requirements for using such a thing.