I mostly do trading, but usually commons for set building. My general experiences with trading usually come down to this: "you gotta find a trader that needs what you have, and has what you need." ... If I am trading to build a set, I find most are gonna be generous with the commons, because they know there is not a high likelihood the person will try to flip them for profit. I usually end up 50/50 in terms of coming out on top or bottom of the swap. My remedy is to trade with someone multiple times, that way after about 5 or 6 swaps both parties will likely come out even. I frankly view buying-selling just as risky (for lack of better term) than trading. I acknowledge that doing only trading could put a collector in a stalemate of sorts with his goals, but "trading" is what the hobby was founded on, so I like that.
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