Dude your PS3 isn't gonna be on ****ing ebay........
Check craigslist and places like that...........If I had taken it I'd sell it on craigslist. Local, fast, no paper or e traces...........NO ebay to deal with. Just post a add that costs nothing, and that PS3 would have sold in hours.................
I'd say 99.9% for sure you know who did it. Any other criminal would have at least taken a look around at everything else you had......Find your friend or roomates friend and go from there bro........