Ask friends for money
Ask mom for money

Other then that I cant think of anything.... Well there is waiting till you get enough gifts to equal 125$

But my recommendation would be to not waste your money on any of those and put it towards something more useful.....

You have to remember that you need to buy games with the psp. Even if it comes with one, how long would it last? Eventually you will beat it or get bored of it. Then you have to worry about getting even more money to buy a new game.