I was 73 when I bought my Ferrari, oh sh*t, our Ferrari, have to include the wife, she has grown to like the car. But she is also on my butt to sell it and buy the one I really wanted, red/tan. Have a red/blk one now.
Her advice, and it always the same, "Are you going to save your money and leave it to the kids. You can bet they will all have new cars before you are cold in the ground. Spend it and enjoy what you buy with the money."
Buy the car, provided you think it is a good one. Just know going into it the car is going to cost you money. But think of it as spending your kids inheritance, not your money.
I remember the advice my father gave me, "When you are old, and think back. You will probably regret the things you did not do, rather that the things you did do."