Why not try earning some pocket money?
There must be odds and sods you can do for your family or neighbours or friends?
Your parents might not have the money to pay you for doing extra chores and things, but your neighbours might be willing to give you a few euros for doing things.
Say, walking dogs, washing a car, raking leaves (which will start falling soon), mowing grass or helping in a garden.
Or maybe try and find a little job.
Your local newsagents or even newspaper might hire you as a paper-boy.
Earn a tidy sum of money, slowly but surely, and you might be able to buy stuff for yourself.
Or even ask your parents if you can split the cost.
I've just searched, and a PS3 can cost about £140~ new.
That's about €160. That's a lot of money. But if you slowly work for it, you'll get it in no time.
Don't be sour and ungrateful to your parents.
Money isn't easy for everyone to get and the economy isn't great in most countries in Europe.
They obviously care for you and your education a lot. Don't be mean to them because you can't get the luxuries you want.
I'm sure there are lots of things your parents also would like but they can't afford.