Yes, you're alright.
But the last 400 available tickets are sold out. Someone would have tried to buy at face value. And they couldn't because this leech had already bought in order to rip someone else off.
I think the situation is that they are illegal if the original selling club don't give permission for them to sell on tickets.
If they have permission ( ie have bunged the club some money on top of the ticket price ) then no problem.