Not sure how close you are on miles, but there are a few ways to get PQM by joining the club or something else. My advice if you just need 1 segment is to use the Kayak Explore map to find the cheapest 1 segment and do a quick mile run before the end of the year.
http://www.kayak.com/explore/
Not sure where you are based out of, but I'm almost sure you can find something to do cheaper than the $600 to buy up. Good luck!