$12K is not a huge asking price for a private sale and for the way it looks. The market is tough at the moment and I think most car dealers will tell you that. There is a buyer for everything but sometimes they take time to surface. The car has street appeal and being an auto is not a disadvantage. It's just the right person needs to latch on.
Personally .... I'd strip the sound system, amp and subs and lower the price accordingly. You'll acheive 2 things. 1 - The car wont look like it's been owned by a young person which "might" be giving a potential buyer the idea it's been thrashed. 2 - A lower price is always more appealing ---- say $11,500