I wonder...how much do these units cost compared to say...a used td04? I know it's not quite comparing apples with apples but be honest, hardly anyone here would buy a brand new td04 unit. I ask because with tuning, some have seen 15psi at 3000rpm with a td04 and the power output potential has been well established. For me personally then, it would come down to cost. How much more/less would I have to pay for such a turbo and would the efficiency/output gains justify the cost? So, what's the price?