Look out for following details while buying an Xbox 360 Console!

1: Lot #0734 (Halo 3) or later (all SKUs)

2: Manufactured on or after 8/24/07

3: Team FDOU or CSON

4: Look for the 175W power supply, not the 203W. See the power rating from the sticker.. the newest versions say 175W

5: Go for Xbox 360 Premium, New concoles are reported to be falcon

6: While buying from eBay, ask seller above questions to make sure you will buy a falcon console with new Chip Set that reduces system heating and solves 3 Rings of Death problem

How to find Lot and Team info:

There is a white sticker on the side of the box with the lot # and team.
In order to find the manufacturing date without opening the box, there is
a flap on the side of the box that allows you to peek inside and see the
manufacturing date on the console itself.