Let the hive mind of Engadget get that for you.
"I'm heading to university next year, and I've purchased a MacBook. I'm also taking my four year old desktop, just in case I'm left with no computers when the MacBook is being repaired or whatnot. With only two USB ports on a MacBook, I want a Bluetooth mouse. Budget is about $100, and of course, it needs OS X support. Thanks for the help!"
In regards to PS3 availability, I was quite lucky that I got my PS3 at £225 this xmas. Sainsburys had a mad offer on, and my friend used his employee discount. There are barely any good deals on at the moment though.