You’re required to make a number of disclosures as per CCP’s character selling rules. You can review that here at Welcome to the Character Bazaar - Marketplace / Character Bazaar - EVE Online Forums
Specifically you haven’t made the disclosures required by Section C of the above link.
And also, you’re only selling a character and not an account:
Selling accounts is illegal and can get you banned.
Also, you need to edit your thread title… you don’t have 640 million skill points. You have just over 64 million.