I want a PS75 birthday present
Why does it have to be PS75?
That's how much the perfect gift costs
You should not be greedy when other people give you gifts. You can suggest to someone if they ask you what you want.
I need this, I deserve this. This is how much it costs.
Birthday presents are gifts, not debts that are owed. If your friend knew they had to give you a gift worth a certain amount they may feel put under pressure and annoyed. Try being more considerate of their financial standing before making such demands for a gift.