Does anyone have an xbox 360? and if u do, are u having serious problems with it like i am?

Most stores have taken steps to prevent you from doing what you're planning on doing - but, I can't fault you for it. I have been in your situation before and done the same thing. My Xbox 360 died with 2 days left on my warranty and Microsoft replaced it with another defective system, and the cycle has continued - this week I sent back the fourth defective system I received and am still awaiting my fifth system.