I just wanted to mention my experience with the $77 rate and to pass along thanks to those who posted about it.
I just called XM to renew & lock-in the rate for my second radio. I couple of years ago I was getting a discounted rate. I think it was $99 but maybe it was $77, I really don't remember. I forgot to renew a few months ago and my account switched over to full price.
I called asking for my old rate of $99 a year. The rep searched her system and couldn't find that I previously had this discount. She kept insisting I'd have to pay full price. I asked about scaling back my service, we reviewed different packages, I kept asking about the reduced rate, I mentioned I wouldn't keep both radios etc. etc.
Finally I remember this forum, found the reference to the $77 package. I had to tell her "I know there is a $77 discounted rate. That's what I want. If you can't do it put me on with someone who can."
After putting me on hold she came back and gave me the discounted rate. $77 per radio for 12 months. As she was processing it she "found in her system" that I was previously given this discounted rate.
I was on the phone with her for 30 mins, but I did get the rate.