I've been playing for 2 or 3 years. If you want to trade, email me saying who you are, what you want, and what you would be willing to trade. here are my basic guidelines:
1 mythic rare = 1 mythic rare, 2 - 3 rares
1 rare = 1 rare, 2 - 3 uncommons
1 uncommon = 1 uncommon, 2 - 3 commons
1 common = 1 common
  It all depends on how good the card is and what you are willing to trade. Purchasing can also be discussed, however I would much rather trade.