You could always wait a bit and buy used (or broken if you can fix it) off eBay. No gain for Sony there. Of course, if you buy games then they'll be making money off that, but if you just want it for research and hacking purposes, then it's a good way to go.
I know I'll be getting one one way or another. I don't even really play many games, I just enjoy tinkering with electronics too much.