Question about Xbox 360 trade in

Hello fellow gamers, quick question. When I was looking at the forums the other day somebody mentioned that EB Games had a deal on where if you trade in your 360 you could get an Elite for a certain deal. I cant remember the whole deal.. does anybody know if this offer exsists of if im completely off? or are there any Canadian deals at EB Games for trading in a pro or 20gb for an elite? Thanks in advance!