I purchased my 2018 plug in about 30 months ago. I have essentially a no-interest finance charge of $518/mo and have 30 more payments to make. The dealer has offered to trade back the 2018 car for a 2021 model and to give me a new 60 mo finance charge of $500/mo. Another way of looking at this is that it will cost me another $15K to own the newer car. My questions are: is this a good deal? Can I get new rebates from California and Fed? From what I can see the CA rebate is still $1000 and the Fed rebate is $7500. If this were possible it would be an absolute no-brainer.