MS Store has a month of Xbox Pass for a dollar if you're a new or returning subscriber (must be signed in to see). Make sure to cancel the recurring sub immediately after signing up. As always, YMMV.
Note: this offer is through the holiday season so if you're using a trial or will lapse before the end of the year, you can still take advantage of this as soon as either ends.
Bonus deal: One month of Xbox Live Gold for a dollar until 11/30. Part of their BF ad.