I had a 4 month for $20 deal that I was using that was about to run out. Called Sirius XM and they gave me several offers that I denied until these options were given:
pay $34.08 (one-time charge) for 6 months of XM Select package
pay $5.68 (monthly charge) for 12 months of XM Select package
I went for the full year deal. They let me apply this offer to both of my vehicles for the same rate ($5.68)x2
Note: this package does not include Howard Stern or other premium channels. Check siriusxm for channel details.
I believe there was an even shorter package available too (5 months?) that was also at the $5.68 rate.
These rates include fees and (N.Y.) taxes.