I just enquired genuinely about buying a Stihl 880, which according to many is the most powerful production chainsaw in the world, referred to for extra butch quality as the 'Stihl Magnum'. (Are you feeling lucky, punk?) Its 122cc. I have a degree of experience using medium sized saws now, plus am having taster sessions in using chainsaw mills from experienced users, which is safer activity than felling. I'm not going to fell big stuff, the pros can do that, I'm just milling.
One question I asked was is it necessary to show certification before buying one, as its a pretty potentially lethal bit of kit, which I have respect for and trepidation about using. The salesman replied with a degree of exasperation, "At least you have some experience and are using it for milling, we have people walk in and buy them with a 48" bar who have no experience at all, proposing to use them for felling big stuff after watching a couple of videos." That's a bit scary.