For $150 I could buy enough games to last me a year. Buying games cheap and selling them for a profit could net me even more.
Seriously, next big game that's coming out with a very limited number of collectors editions (the big $150 ones), buy two of those and sell 'em on ebay. That's 4 free full price games in profit right there.
Meet the new love of my life-- http://itotd.com/view/80/