I'm currently doing some rare trading in a type 6 in preparation for an Asp - I see the Asp as the next ship up from the Cobra that allows you to do a bit of everything with one ship without being locked into a single predominant role.
On my travels I found some useful resources I'd like to share here (hope this is allowed?) Also apologies if these have been posted already somewhere on these forums.Trading ship comparison
: https://www.youtube.com/watch?v=6HWGpaE1ZasElite: Dangerous Trader's Bible
: http://imgur.com/a/XxdyKHow to find profitable trade routes
: https://www.youtube.com/watch?v=oXyYykbk07AHow to trade rares once youre at a Cobra / Type 6
(I'm using the Lave <-> Torach Tor one and its doing quite well, around 2-2.5m per round trip): https://forums.frontier.co.uk/showthread.php?t=84884
Hope these are of some help.
Any of our traders here have any advice from Asp onwards?