https://www.dropbox.com/s/nbgf1jgfh7vd4n5/Route.pdf?dl=0 is a route with 76 stops and 160ly sell range for maximized profit. The route is also more optimized than previously.
I know the max is not accurate for all stops, but I just couldn't be bothered to update them
Each rare commodity has a different optimal sale range. Someone calculated that for all of them.
The average minimum is 170ly.
You can use this tool to create optimized loops.
Requires bit of knowledge how to set up and needs to calculate for a while.