Gunbot is sold thru Resellers, Guthy.org does not sell licenses, all those sites you mentioned are Official Gunbot Resellers and pretty soon you will see more, since every Gunbot Owner can become a reseller, a new site will be updated soon with a resellers page for buyers to verify and choose any particular reseller.
The price is the same for all, the choice of reseller is yours, some offer extra support or a different language.
You can read more about the new developments here:
https://viraltrading.org/gunthy-exchange-gunbot-school-resellers-program/Im also part of the new resellers program, so you can ask me if you have any more questions.
Hope it helps.
I know it is sold from resellers, but if you check the message I am replying to which was carlfebz2 who said "let's put up some link" and put up gunbot.com which is a resellers. You can go to gunthy.org and find the resellers there and you could talk to gunthar himself if you want to, do you think gunthar doesn't sell at all? He does sell himself if you ask to him as well and nark and ex would help you with the support as well, they are official support of gunthar, at least they were when last I checked. Which is why I think it is crucially important that people should know which website is reseller and which website is the original.
Go buy from any reseller you want, but know that you are buying from a reseller, what carl did was looked like gunbot.com was the OG website and I just wanted to clear that up, the original website is gunthy.org