Landmark Closed Beta Keys - $0.30 USD (in Bitcoin)
Xbox Live 7-day - $0.30 USD (in Bitcoin)
XBL 1-month Code - $4.50 USD (in Bitcoin)
I prefer to sell $1 or more at a time. I have hundreds of feedback I can show for similar transactions if needed, and I will go first if your feedback is excellent. All XBL codes are region-free.