Speedy_NES

Hey guys, I've had this item for a while and I'm looking to sell or trade it, but I have absolutely no clue as to what it's valued at. It's still sealed in the plastic with paperwork etc and in superb condition minus some dust and a bent corner, considering it's from 1982. Any idea on what I should price this at? I'm not sure how large this thing is if it were to be set up, but in its current unassembled state it is 15 x 22 inches. Thanks in advance! Pic: