They can be hardball negotiators but if you persevere, you can get a good price.
Here is what I have figured out over the last 10 years and 5 different cars.

Wait until you are about 3 or 4 days away from the end of your trial period.
You MUST physically call them, you cannot barter online. Just play the game by refusing their initial offers.
You will get the run-a-round with a couple of unacceptable offers.
After you refuse those, they will usually transfer you to an ‘Account Specialist’ who will make additional offers.
Just keep refusing until you finally get to about $5/mo. It may be $25/5 mo. or $30/6 mo.

I had to do this for a couple of years. Last year they finally offered me $60/yr. and I got it for both cars.

Also, with your subscription, they may not tell you this, they have a mobile app for cell phones & a Windows app that is free.

Jerry, I didn't mean to sound so negative by saying that I've had no need for subscription radio. If it works for you fine, I just don't need another subscription and either listen to local radio in the car or have literally thousands of MP3 tracks that I can listen to without any commercials. I use local radio more for news and information than for music anyway. I didn't mean to sound insulting with my initial response and if that the way it was taken I do apologize. I too enjoy your many thoughts and posts and often participate in them.