I can get functional (maybe not the greatest or lightest but they work fine) shimano brake/shifter pods for a mountain bike for around $30 a pair. Higher quality pieces ramp up from there (and there are probably nashbar-type units for less.
Why can't I get anywhere near that for similar road shifters? Nashbar brand brifters are still $200 a set and I can't even get good used prices.
My situation is this, I have a bike with a dying 600 2spd left brifter and a perfectly good ultegra 9spd rear (upgraded from 8 to 9). I also am trying to put together a cross bike with something like a 1x9. I have many options...I could simply buy a used left brifter to fix my current problem (assuming that almost any 2spd ultegra/600/105/whatever will work). I could buy a used set and use the left one to replace the broken part and the right one to go on the cross bike (I could go 8/9/10...doesn't matter). Finally, I could buy a new set, put both on the road bike, and move the still working ultegra right shifter to the cross bike.
Why are these parts so much more expensive that even used it would cost me many multiples of what a brand new mountain brake/shifter pod would cost.