Does selling courses legal?

[55]

Hey, I saw a lot of people selling for example, Biaheza's course, I wanted to know if it's legal to sell it. can Biaheza sue the seller that sells his leaked courses?

[1.127]

if you want a sell Biaheza's course for 20$ it costs 300$

[55]

if you want a sell Biaheza's course for 20$ it costs 300$

what do you mean? I don't want to sell it, I'm just asking if it's legal to sell someone's course without buying it orginally.  just using a leaked link for the course

[596]

Is it legal to use someone's rewards points off cracked accounts to buy stuff? Lol