Economics 101: C-
The reason there is none on the market and what little there is is expensive is because it's in HIGH demand. And the OP knows why, it's really hard to come by running missions on your own.
The rest is still absolutely right. Crank out the blues, the slightly less you'll make per item will be made up for by cheap materials and faster sales. Keep running the missions to get neuranim and sell it raw for those huge prices.
Or hoard it incase you ever wanted to make some purple items for an alternate character.
You're right my bad. I mis-read what I wrote