My iPod touch home button not working?

yesterday it was working perfectly. I was in my pocket all day, but when I got home I realized I had to press the start button at least twice normal first then hard before to register and leave an application. soon after you stopped working completely do not know why. I've had for three years and I think my warranty is out so often fix Apple. I asked $ 150 to replace. No I have $ 150, so what do you do?

Unfortunately, it has been broken.

iPhone 3g & 3gs Home button, and LCD screen- step by step repair or replace – HD

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