I agree with most of what has been said here. Buy bundles, trade, and go to ebay. Rarely buy straight up from GW. PLay the game, find out what works and what doesn't, and what fits your play-style. Generally, 'bad' units that fit how you play will out-perform 'good' units that run counter to your mind-set. Also, Ordo is a great place to learn, dive in!