Just remind you that:
All copies are illegal to sell. That's the law!
If they are selling copies, those must be bootlegs but they will never admit that to you.
Below is a bootleg DVD store:
Link hidden: Login to view
You can check by yourself to see if the products are the same.
Nowadays, reselling illegal copies is a very dangerous behaviour. It will put your familiy in danger if you are in a developed country.
In US, once you are caught, you will stay in prison for 5 years or pay the fine of $250,000 USD.