Thermal Expert now lists prices for their 1st and 2nd gen cores on the European website. https://www.thermalexpert.eu/deutsch/produkt%C3%BCbersicht/w%C3%A4rmebild-einbaumodule-thermal-cores/ There is also a XGA variant but it is missing the price. There is no English translation yet.
Also, "Delivery only to tradesmen, industry, trade or research institutions."
It's not hard to say you're using it for industry so I don't expect that to be a problem. Maybe it's more for preventing use by another nations military
If they believe me as easily, they'll believe pretty much anything else, including the stories from those that actually work for that another nation's military, pretending to do real business (especially when they actually do real business, too).
Also, if they want to be as easy about it, they could just as well just drop that whole limitation. Unless it is something about having to satisfy some legal/bureaucratic requirement which isn't really significant in practice.
And yet more, lets assume I just state "for industry", then they want more info... up to a point when a question comes that I won't be able to prove (say, they ask which company I'll be doing things for and want to confirm it from that company). Oops, I'm caught lying. Good chance I wouldn't be able to buy anything from them after that.
(The simpler solution sometimes used is to create a mini-company by oneself. I've been thinking to do that a few times, but it also has some bad sides to it.)
All theoretical for my case, though, I wouldn't be buying any of those any time soon, the TE-Q1 should be good enough for my needs for some years. I just thought to point that small limitation.