where can i find a b16a motor for the lowest price?

i have a d-series motor in my hatch right now, and i've decided on the b16a motor. i'm now in search of one for the lowest price. where would be a good place to look? how 'bout a junk yard? anyone ever heard any good junkyard stories? also, would i have to do anything to the trans or anything else when droppin' it in? thanks in advance.