Yea, I've been there and really, unless you need the money for food or bills, its hardly ever worth trading in stuff at most stores, there's no way I'd let go of an old console for $10 cash.
I've done similar things tho, hell, I've had a lotta hardware over the last 15 years or so, and all I have to show for it is a PS2, Xbox, and Dreamcast, and a couple of pcs. Note my first console was an atari 2600, the one carved out of wood.