Where would be the best place to sell my Buick Regal 2000 (120k milage) and how much should i expect to get fo?

You can advertise it in the local paper or post it on line at auto trader.com or cars .com and/or just put a for sale sign in the window. I would suggest that you look at some of the new cars(non hybrid) that get in the high 30-40 mpg range. You pay a premium for a hybrid and it doesn't really save you money. Good Luck