Trading is different.  I'm giving away games that I probably don't play anyway, so it's not a big loss.  $200+ dollars is groceries, or my car payment, or taking my girl out, or buying my son clothes.
Now, I understand that my priorities were different even 5 years ago, when I was single, and buying $300+ Neo Geo games.
But I STILL play those Neo games.  Its the nice thing about the Neo - arcade games can be played for a half hour, and then put away.  I played Earthbound, and didn't get into it.  Bought it for 40 new (ages ago), and sold it for $100 complete (again, ages ago).  Its one of the few SNES games that I honestly don't miss.