Well, because of the US$200-US$250. Don`t get me wrong. I don`t think it is expensive, but I already have all the parts to build it and laser cutter at hand for making custom case at low price. I could make it pretty cheap if I can buy just PCBs. If you sell it just as a kit, I understand. No problem.
OK... US$250 was overestimating... I'm getting closer to the final price, which should be US$205-US$210, including case and SIDs.
The cost breakdown is sort of like this:
SID x2: US$53
Parts include bulk ordered components from Mouser, Digikey, and my own stock of LCDs, encoders, knobs, rocker switches, screws, spacers etc.
I am now committed to a trial batch of 25 kits... meaning, I've started ordering enough for 25 full kits. If this trial batch of kits is a success and it leads to more batches (i.e. there's a long list of crazy people wanting one), then I can order extra PCBs when ordering for the next batch... i.e. "just PCB" orders can be handled quite easily if I know exactly how many there will be before I order PCBs.
Sasha: since I know your situation, PM me with details of what you want, and I will order extra PCBs just for you when I order this first batch of 25.