PSP ( playstation portable) is a nice game .I bought it 2 years ago . The best thing about it is that it is portable i.e it can be taken from one place to another. And I think this is the basic reason why people buy psp instead of ps2 as their price are similar. The model I bought of psp didnt have wifi so it was a drawback and if you will buy now then also it will not have wifi. Further if you want to spent around 6500 , go for ps2 because you can play it with your friends too.Another drawback of psp is that you dont get much games of it , no new games are coming for psp.
At last I will not recommend you to buy it because it is not worth its money.