I'm a bit surprised at the overwhelming "never" for answers here. I used to hold on to stuff too, that's how I grew up. My father refused to sell anything or even throw stuff away.
I finally learned to let go though; as a practice in new age spirituality to counter the effects of materialism. I've made many mistakes, though. I've sold 2 PS3's in the past and I'm currently on my 3rd one. I've also re-bought many games I just wanted to play again like Eternal Sonata.
However, I've also earned quite a bit back. My entire PS4 was paid off for by store credit at Gamestop.
By trading your games and consoles you can earn quite a bit back. Not to profit or anything but it can definitely make your hobby cheaper. That's why I asked the question, my mindset is that it's common practice to sell and trade stuff to finance your hobby.







