My 2013 Yellow Chevy Spark Quest

over 2weeks ago, I called all the Chevy Dealers and tried to order a 2013 Yellow Chevy Spark Automatic LT1 - Only one guy from the OC Branch got back to me - he told me he was ordering it and it should be here in 2weeks - last week I called him to check up on it and he said 'no worries, that he will call me back in a day or so' - so far no call - I`m getting impatient - I want my car!! I am also worried, I don`t wanna get ripped off - the Sticker price is around $15 grand - I am paying cash - is it possible to get the price down? How much do you think the total payment will be including taxes, lic, insurance....etc to drive it off lot?

Updates: 
 they cannot find any yellow any where - seems they are a little late having yellow being made - finally my dealer called GM directly - they can order it....but it wont be here for 4-6 weeks and they want me to put a $5000- deposit to hold it.
- just to double check- l called and went online -no yellow to be found - but they are ordering me one - l will do what you guys say once the car comes in - thank you all for your help.....l need it.....l don`t want to get ripped off - l cannot do the payment thing, because of my bad credit and once they learn that, then l am a can to be kicked - l want to pay cash - but l do not want to pay the full sticker price and l do not want any hidden fees.
 However, I think I just forfeited by haggling rights by ordering it & putting a deposit on it, huh?