This story just proves it again - if someone’s selling you Bitcoin at a discount, especially off-exchange, you’re probably not buying Bitcoin… you're buying risk.
Why would anyone part with the hardest money on earth for less than market price, unless they are hiding something?

That’s sound logical, because of the existence of money laundering and wallet hacking, we are all advised to check the source of the coin, and the reputation of the seller, if you don’t have these two, you’d better buy Bitcoin in a reliable exchange to protect yourself from a dirty money route.
If the seller cannot provide valid reasons for selling at a discounted price, then you should be suspicious.
It's actually very easy to spot a scam; simply offering a discount is enough to raise suspicion. Sometimes I don't blame the Bitcoin seller, but we also need to blame the buyer for being so tempted by such discounts, even though the signs of fraud are clear. Logically, buying Bitcoin on a trusted exchange is safer than buying from someone or a friend with a tempting but risky discount.
It's like buying a cheap car without proper documentation. When caught in a police raid, it turns out the vehicle is stolen, and you face a harsher penalty for buying stolen goods. So, be wise when buying Bitcoin. Buy from a trusted platform, not from a friend.