Then if you knew all about this device, why bought it in the first place? And why selling it so early? Not satisfied? Don't like the color? Is it problematic in any way?

And yes, it is a "Buy & Sell" section in a COMMUNITY page, not a "I just bought this to sell to you suckers and make profit at your expense, because you didn't manage to get one when it was sold". And this is again my humble opinion.