Axiolabs Website Source Check

went to the axiolabs website… they have their little “source check” function where you enter in a website or email and it tells you if its legit or not. question is, is this a reliable way of telling if a website or email supplier is legit? if their site tells me that soandso.com is a “valid reseller”, does that make it safe to dish out the $150 minimum a few of these sites impose?

just wondering if this is reliable. thanks.