So I found this account on mpgh that has lots of benefits for csgo and can turn into a main account. I want to buy this account and make it my main but the person selling it cannot provide the original email. I want to make it my personal steam account which means there will be high value skins/knives so this original email thing is a big deal. Is there any possible way to change the original email, I think the seller has the email and password for it so I can make him change it. Help or advice would be appreciated

Please note I am talking about original email. Not contact email.