3 x Antminer S1's will do about 600 GHs, overclocked and will cost 3 x 0.877 = 2.631 BTC. So your 550 GHs Jupiter should cost about 2.5 BTC, no?
I dont think is quite fair.
His jupiter is not overclocked and not 55nm like S1s.
Its 28nm and lower consumption, better technology, maybe little higher price.