I have had 1770 msp on my account for a while now, but when I actually wanted to buy something with them, I came to find that I only had 170. I haven't purchased anything recently, and when I checked my purchase history, it did not indicate that I had purchased anything with the 1600 missing msp. I did some reading, and found that some people have had the same problem, and that their msp simply expired off of their account. I haven't bought anything for a while, and my points may have expired, but it is ridiculous that I have to purchase virtual money to buy things off the marketplace, then have that virtual money expire. I would like my points back, so I can actually purchase things off of the XBL marketplace.