My friend doesn't like his NES anymore, and I asked if I could buy it and he said no problem, but I don't know what a reasonable price would be. I offered $70 for it since it was fairly used, and he insists that he will also throw in a few games with it; Super Mario Bros, Legend of Zelda, Final Fantasy (for an extra $10 lol), Duck Hunt. He is giving me that for $70, (including FF $80) Is this an appropriate price? I don't want to rip him off.