I also want to add ed-td.space is a good one. It uses the EDDN like Thrudd's it's just in a bit different style.
Then there's
http://hausreport.github.io/ which uses eddb.io
They're all good to be honest. It's just which UI do you enjoy more
also, there are the "rares" if you feel like traveling and exploring the known galaxy. By having enough credits for a good T-6, one could also make one heck of a rare-running ship. A class FSD, making sure the fuel range is at least 160ly, the works. And... then there's always playing in open in that regard too if you're ever bored. All the pirates know the rare routes and camp them at will.
Good news for you though as a trader, is instead of 200tons of cargo, at over 1MIL in investment that could get lost, it's only 300-1,000 credits per ton, and only at most 40 of them. That way interdictions, working against real life PvP pirates can be entertaining, but without as much risk.
Also, don't go no shields. At least if you're like me. Earlier today, I swear someone greased my landing pad. I couldn't get my cobra to "stick" if my life depended on it for a while. So I finally just planted her, HARD. Another instance - NPC flying a T-9, full thrusters through the mail-slot. I was glad I had the cobra's shields so I could bounce of the walls to get around that beastie