The following is something of a rares trade route I worked out, based on the Ethgreze-Yaso Kondi ring posted somewhere upthread. It’s been adapted to make better use of 80-100 tonne cargo holds, since the basic idea of the ring is to try to sell as much as you can at either Ethgreze or Yaso Kondi, which are 250 ly or so apart. If you have a good frame-shift drive and plot your routes for speed, each hop, from docking pad to docking pad, should take about 10min. The entire loop takes me about 3-4 hours, depending on interdictions and such, and nets between 2-3M CR, conservatively. If you have the required permit, start in Vega, otherwise skip it and go to Altair.
[ul]
[li]Vega (permit req’d), Taylor City: buy Vega Slimweed, fill remaining hold space with animal meat; 15 ly to…[/li][li]Altair, Solo Orbiter: sell animal meat, buy Altairian Skin, fill remaining hold space with crop harvesters; 17 ly to…[/li][li]Epsilon Indi, Mansfield Orbiter: sell crop harvesters, buy Indi Bourbon, fill remaining hold space with coffee; 44 ly to…[/li][li]Xihe, Zhen Dock: sell coffee, buy Xihe Biomorphic Companions; 62 ly to…[/li][li]Coquim, Hirayama Installation: buy Coquim Spongiform Victuals, fill remaining hold space with crop harvesters; 86 ly to…[/li][li]Quechua, Crown Ring: sell crop harvesters, buy Albino Quechua Mammoth; 89 ly to…[/li][li]Yaso Kondi, Wheeler Market: sell everything but the Coquim Spongiform Victuals and Albino Quechua Mammoth, buy Yaso Kondi Leaf, and note that it is illegal in many stations (but not stolen!); 68 ly to…[/li][li]Delta Phoenicis, Trading Post: buy Delta Phoenicis Palms; 64 ly to…[/li][li]Utgaroar, Fort Klarix: buy Utgaroar Millennial Eggs; 58 ly to…[/li][li]Chi Eridani, Steve Masters: buy Chi Eridani Marine Paste, fill remaining cargo space with animal meat; 56 ly to…[/li][li]George Pantazis, Zamka Platform: sell animal meat (and the Yaso Kondi Leaf in the station’s black market if you don’t feel like carrying it around any longer than is necessary), buy Pantaa Prayer Sticks; 15 ly to…[/li][li]Zeessze, Nicollier Hanger: buy Zeessze Ant Grub Glue, fill remaining cargo space with tea; 55 ly to…[/li][li]AZ Cancri, Fisher Station: sell tea, buy AZ Cancri Formula 42, fill remaining cargo space with agri-meds; 69 ly to…[/li][li]Ethgreze, Block Station: sell everything but the Pantaa Prayer Sticks, Zeessze Ant Grub Glue and AZ Cancri Formula 42, buy Ethgreze Tea Buds; 72 ly to…[/li][li]Vega; loop repeats…[/li][/ul]
It should be obvious, but if you ever run out of cargo space, sell off just enough of the rare commodity that will make you the most profit to allow you to purchase all of the current station’s rare commodity. Also, the market refreshes every 15min or so, so if the station you’re at only sells a piffling amount and you’re unhappy with that, it might be a good time to take a little break. And finally, for smaller ships that don’t want to do the whole thing, note that Zeessze, George Pantazis, Vega, Altair and Epsilon Indi are all very close to one another. Grabbing the rares from them and selling them in Yaso Kondi might just be your thing instead.