I did a mock order at yardlover.com of the 4 EB unit.
With shipping, it's $200.63 total, which comes out to $50.16 per EB.
If you purchase 4 EB directly from EB, it's $136.75, $34.19 per EB, but you'd need to purchase dolomite and fertilizer.
I think purchasing from Earthbox.com during one of the sales is actually a much better deal.
IMHO
