I just signed up for a promo that is $5 per month for everything; good for a year. I can't find the promo code though.
I usually get it for the summer- 5 months of the basic plan for $20. That one is SAVE20M
The catch is you do have to call in to cancel, and wait on hold for an hour. However they will usually extend whatever offer you are on.
Edit- found the link on FB again.
Offer link