Seller able to recover Steam Account sold, ways to prevent and what to do after?

(Copy and Paste from an email I sent)

Hey,

I’m thinking of buying this CSGO account for around $250, the seller looks legit with 150+ thanks, 15+ reputation and has made 150+ posts, but I just thought of when you buy a Steam Account, isn’t there a way to get the account back by telling some information to Steam Support like email of the Steam Account and also product keys that was activated on the account? I was just thinking about that and how easy it is to get back an account you sold even if you changed everything and have the Mobile Autheticator on, Steam Support can easily remove it and give you a reset password request to the email that is unknown to the buyer, is there anyway I can stop and prevent this from happening? because I really want the account since it’s got the badges and coins that you cannot get anymore but I also do not want to get scammed.