>>12723853you can either purchase a booster box and sell off the single cards asap. special lands can pay for the entire booster box alone if your lucky.
also, for modern/legacy, look for top decks and hunt for the more expensive cards for a bargain price, then turn them around for a profit.
if your the creative type, make your own creature tokens. if theyare any good people will buy them in bulk for $1-$3 a pop