Why not? Your cel, your decision. Don't renounce 
to legit profit out of politeness. If you can get 
2k for what you bought $5, WHY NOT? Nobody holds 
a gun to the buyer's head telling them "Buy or 
die".

You know, I bought my Valgarv $400, the buyer for 
$510 is very happy. I bought Nuriko $16 and sold 
it $49, so what? Everybody's free to sell and buy 
at their own prices. 

Market ain't about fairness. Nothing is fair, 
nothing is unfair. There's only legal and 
illegal, and selling your old crap isn't illegal. 
You wanna rid yourself of it and get some cash, 
why not...

Especially in the collector's world, it's a 
fierce fight. 

^^