keep it man that is the deal of a life time i wish i could find some dumb ass who has no idea what ia 93 cobra is for 5k hell i traded keegan for his old one and ive almost got 17k in it right now..
if i were you i wouldnt sell it for under 20 .. get it cleaned up drive it a litlle fix what is wrong with it and put it away un modded worth so much more than 15k in my mind low miles too
Low frequencies from a sub are virtually non-directional, so it doesn't really matter which way it points. Packaging usually dictates which direction it goes.
Good Luck with the sale. Unfortunately for all of us, the market looks to be pretty soft right now...