The "gag" ist to have a super-compatible design. Because the instructions are 1:1 identical, the failure rate is pretty low. Clocking the design to 7MHz gives you 99.99% compatibility with a standard 68000 processor. All you do is to remove your CPU and plug in this card. CDTV owners might need to relocate or replace a capacitor.
The price will be highly dependent on volume. At 50 units made it's pretty expensive. It gets cheaper when we can build 100 units and even cheaper if we make 500. We'll communicate more detail when it's time to do so. Currently we're still testing some parts. Changing a voltage regulator for another one can add or substract EUR 5.- so... we're at it!