From one of the insiders at Kel-tec stated they are going to go for $415, but he stated it will more than likely run between $300 - 350 from your local shop. Kel-tec is pretty good about the prices for the pistols they sell.
Quotes: MSRP is only slightly higher than the SUB-2000, so you can expect the actual selling price to be about the same as the SUB2000. I think it goes for about $300 to $350
Possibly a rifle version as well...
a rifle version (RMR-30) is an obvious and likely successor to this pistol. But I have no further info on if or when it will actually get produced.