Best option after free trial with new car

I bought a new car last month and it came with 3 months free of Sirius and then I got the offer for 3 more months for $2. So far, I have not signed up for anything so it will just expire after the first 3 months. Am I better off just letting it expire and then trying to get a better deal?

I also have another vehicle that is currently on the $6 per month that expires next month. I barely use that car so before it expires, I am just going to ask for that $99 for 3 years and if they so no, then I will just cancel it because I don't really even use it. Honestly, with all the other music options I have, I can probably go without for the new car too. Do you think there is any chance they will do the 3 year $99 for both? I guess I hold all the cards here because I can do without it.