s things to say:
1st dont close the trading forum because the trades will pour over into the other forums and theres gonna be a problem...

2nd I think that haveing a duped rare isnt so evil simply because it is impossible to find ALL of the rares you may want. However, when trading for rares make sure it is a fair trade... that way, you in fact "earn" the rare you trade for by trading items you worked hard to find. If legit players followed such a practise legit trading would, once again, be a viable option.