The shipping for the IRD MB-100s were USD$85 and the taxes were AUD$127, I got the taxes a little cheaper as the price on the MB-100s was marked down on the paperwork to USD$300 instead of USD$538, so all in all it cost me just over AUD$900.
I’ve compared them to a few of my friends amps> Consonance C1, NAD C352, Rotel RB 1070 and Redgum RGi60.
For what its worth I favor the sound of the MB-100s, clear extended without any harshness, the Consonance C1 comes in second.
Oh and did I mention the MB-100s are extremely well built.