Same with everything. Computer parts initially come out in the server, enterprise and enthusiast spaces is because those groups have the money to pay the prototype and factory startup surcharges.
For that matter, I once saw a listing on the webpage of a company (years ago, back when a 250GB SSD was a big thing) for a 16 TB SSD. Price? $40k (USD, I presumed). No store listing, no store locator, no contact page. In short, "if you don't know where to get these, you can't afford them anyway." Who'd buy that? Companies for which a half-second saved by 40k can easily be 1,000k plus.