Buying a car in retirement

As I approach my 70th birthday I’ve decided it’s probably time to buy a new car even though my nearly 19 years old car runs well . Given my proclivity for keeping cars a long time, this is almost certainly going to be my last car.

My question is what are your thoughts on approaching this? I am not interested in leasing or buying used.  My sources of funds are a tax deferred account, a brokerage account and a money market account . My house is paid off and I have no other debt.  I should probably mention I dislike the process of buying a car. In my past experience even if  you think you’ve negotiated everything online they still find a way to waste your time.

Thank you.