i have been told only certain versions or sizes can play the playstation 2 games, and im wishing to trade my ps2 with some money for a ps3 console that is able to play the new ps3 games as well as all my old ones.....
The previous answers are all partially correct. The 20 and 60 GB models have full PS2 compatibility. The 80 GB with four USB ports will play around 80% of PS2 games. The 40 and the 80 with only two USB ports and the soon to be released 160GB models will not play any PS2 games.