Scams of 500 dollars question

[Coupcunt]

So because you can only mug for 500 dollars, would it be allowed to scam for something worth 500 dollars? 

For example, you scam somebody, with your job correctly set, of course, for something like a shitty glock or blowjob, he pays you 500 dollars and you run away quickly.
Is this allowed? 

I ask because it is not really any different to a mug, its 500 dollars so I dont see the issue and im just checking up on it.