I would say triple to start due to lack of supply.
As more players get the schematics, figure the prices will eventually drop to the cost of the materials: 1.4m.
Ouch, steep. I only have about 25mil credits and am still in 2/3 72s (and some of my 78s are not "optimized") so I'm looking to get in full 78s ASAP and may not have enough creds to do so. My raid group just doesn't raid very often and I have bad luck with rolls (still only have 1/6 set pieces I need, this won't help that) and I want to be ready for the 81 hunt as soon as its released.