returning/selling haram goods

:sl:

salam i want to return some used games to the shop (i bought em frm there). at the shop they will buy your used games and sell them on (u dont get a full refund cus the games are used). when i bought them i thought they were halal basically Gta 4 and others, but now i know theyre haram i want to get rid of them.

are they halal to return in such manner or should i dispose of them instead?

i dont want to discuss if the games are halal or not, ive come to a desicion they are...

jazaks