SO MANY types of Gevey Sim. Help Please?

Could someone point me in the direction find a authentic gevey?

When i type in gevey sims the first website is unlockturbo sim but then i later read that the only website that sells authentic gevey is applenberry. BUT oddly enough the one i want is the gevey supreme because i rather not jailbreak but then when i read the "counterfeit" section at applenberry, it says that gevey does not make authentic "gevey pro pus" or "gevey supreme"

what exactly is going on here? Whats a reliable site to buy the gevey sim (still would prefer a supreme though. don't want to jailbreak at all).

i read that some of the cons of using a imitation gevey is bad power consumption, heating, and the possibility of getting stuck :X

but at the same time, the "authentic" gevey websites does not list that os5 could be unlocked if the baseband is preserved. man im confused.