Offer your thoughts or opinion on the input financial query or topic using your financial background.

Saving for a non-necessity
Total income - mandatory spending (ie bills) = discretionary income.  Make a budget and calculate how much discretionary income you have each pay period. Save some fraction of your discretionary income towards this purchase. Pull the trigger when you have enough saved.  By thinking this way, you ensure that the PS is robbing from movies, dining out, booze, etc instead of taking from rent money or the electric bill. Do not use debt to make this purchase. It would be wise to put off this purchase until you have a solid emergency cash reserve that can sustain you if life throws you a curve ball. You should also make sure to eliminate any bad debt, like credit card debt, before splurging on a new gaming console.