I'd try craigslist 1st, then take it to Sound go round.
You'd get a pretty fair one, I've had luck trading in systems with them for fair prices. Peaches more than likely isn't telling the full truth of the situation.
It's hard to say, obviously depends which games and condition. But I know locally, they offer the best trade in value.
Not a good one my son was offered $50 for his ps4 woth 1tb memory still in the box brand new. He was selling it because he already has one.
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