You have to order directly from the manufacturer in Canada - so they sell by the pallet. For 4x8 sheets, 3/8" thick is 66 pieces, 1/2" is 50 pieces.
1 pallet delivered = $2,500 (ouch!)
each additional pallet about $100 less per pallet ($2,400)
full load - 12 pallets - about $2,000 per pallet
Much more expensive then drywall, but the question is given the ease of use, lack of dust, etc...is it worth it? I haven't been able to figure that out yet.
I do have samples on the way - if anyone wants to see them once they arrive, PM me.
For every complex question there is a simple answer, and it is wrong.