Congac is niche colour - those who want it will pay a shiny
penny for it, but those buyers are few and far between.
Your best bet is to decide what a comfortable number would
be and post it - if its to high you'll get counter offers,
if its too low you'll sell in a day.
For reference I have had a complete black interior for sale
for the past two months at $1300 and can't get a bite.
If you decide to part it out let me know what you want for
the driver side door panel.