I have not leased a car before but am considering an offer on a 2015 Kia Optima LX (MSRP $23,090 incl destination charge) in southern California. Don't have all the details but was offered for 24 months at $129/mo + tax with $900 up front (to cover college grad and military rebates I don't qualify for). I believe this includes 12k mi/yr. Don't know the residual value. Does this sound like a good deal? How much should I expect to pay for GAP insurance (my insurance company does not off so I would probably be stuck with what the dealer offers)?