Ok, a couple of days ago I erased my HDD because it was almost full and my Mac was kinda slow, when I went to the reinstall option in recovery mode when it asked me about my Apple ID it said that "this item is temporarily not available. Try later" and after that I started searching information about this issue in some forums and found no more solution than doing a Bootable USB, after a couple of hours I made a bootable usb and then I used the "hold option while booting" tutorial but surprise it doesn't work, I already reseted the PRAM and it still doesn't work, I have an early 2011 MacBook Pro, thanks in advance to anyone trying to help me solve my problem.