Deleted

I think you should be more worried about the possibility of penguins starting a nuclear war.

I don't believe that they will add reselling of games in the near future. IF that ever happen, then the support team will make a decision.

What makes you guess we'll be able to trade/sell already registered games at all?? Did I miss some news and/or rumours? Because I really can't see Steam saying yes to that.

Steam looks to be getting ready to allow people to lend their games to friends. This hasn't been confirmed anywhere by Valve, it's just because of a few lines of text in an update file.

This has been discussed to death. We need Valve to release official info before worrying about anything.