No, you would sell them and they would be removed from your account. Obviously any game without copy protection is already pirated easily without resale. Steam does actually have the games linked to your account and could remove them from your account when you sell them.

Let us resell games with a set min/max or resale value and let the dev of the game take a cut of the resale. Everyone wins.

Dualshock 4 works fine for me. With the program ‘Input Mapper’ I can use it in any game as if it was a Xbox controller with no configuration required, plus I can use the touchpad to control the mouse.