So basically my best friend's girlfriend's brother is selling a car. He wants it out of his house and is selling it for a ridiculously low price because he just wants it gone I guess.

He knows literally nothing about cars and I guess he doesn't understand that he's selling the car for like $5000 less than the regular price. Apparently there's nothing wrong with the car, clean title, no codes, all that. I'm very knowledgeable about cars and general engine mechanics so I can tell when a car is broken or not. I will absolutely buy it if it's in good condition.

My plan is to basically flip the car for a huge profit. I lied to my friend and told him I wanted the car for myself.

If I successfully flip this car I'm going to make a very large sum of money, especially for our age group (early 20's).

If he finds out that I flipped the car for a huge profit should I just expect our friendship to end? I feel like my friend would be very angry that I profited off his girlfriend's brother. But the way I see it, we are making a legitimate, voluntary transaction.

If you were in this situation what would you do? I can't tell if it's my anxiety worrying about this, or if this is something that any neurotypical person would worry about. I need the money but I don't want to lose my friend over a few thousand bucks.