Nissan dealer wants my 2013 370Z!

[ped]

Dealers keep pestering me with postcards, email and phone calls the last 3-4 weeks saying they want my 2013 370Z in trade (or outright to buy it from me). What's the deal? I told them I wasn't interested until the new Z is released. What would be the point of trading a 2013 touring with sports and all options, plus HKS catback, Stillen G3 CAI and UpRev tune for a newer, identical, 370Z other than lower mileage and new warranty (which I already got an extended warranty on mine so it's good for 5 yr/60k miles already and I'm nearing 40k miles)?

I thought the auto industry is doing great the last several months, so why are they jonesing so hard for used cars (or to simply generate transactions from people upgrading/trading in)?