This whole CODMW2 business. I've seen loads of threads expired, moved to misc, reinstated, moved back again etc that its getting boring.http://www.hotukdeals.com/item/518958/call-duty-modern-warfare-2-xbox-360
It seems to me that you either need to allow people to post info before hand, or don't. People who lie could be banned, thus making it a bit of a silly idea to try nd grab a bit of heat by posting a false deal - it's going to cost you your account here.
The best way I can see round it is to split misc (as has been mentioned multiple times) into nonsense and heads ups, whereby you could still vote hot/cold in the heads up section, and move across to the deals forum once it has been confirmed
At the end of the day if a product in the deals section has no stock its expired, well if its pre release info there is also no stock and should be treated similar. The info is useful though and the heat system (which works well in the main) would allow us to see the hottest tips, pre orders, whatever