Best sector for mk3 local trader?

[Goat]

i am currently using ore belt for my trader... Argon sectors are preferred..

[Paramecium]

Empires edge will rank up traders very quickly but it's not Argon. It has the advantage of upping your standing with the Paranids quickly too.

[Jeffreyac]

I used to use The Wall or the hole - when the solar power plants are stocked, it's good for a few runs. Initially I'd start a trader in one sector, then if I see him go idle manually move him to the other.

Honestly, though, it's probably no where near as good as empire's edge. More energy cells than ore belt, though - I've also used home of light with some success (but, then, I've added a couple of factories in there with station build missions, so it may work better than normal...)

[Fedora01]

For starting out I recommend The Wall, Queens Space, Ore Belt (assuming GoD hasn't had its way with this sector yet), and as previously mentioned, Empires Edge. These are probably four of the safest and most reliable sectors.
The NUMBER 1 thing you are looking for when it comes to good sectors is whether the sector has a solar power plant, after that you can screen for possible resource chains. Empires Edge usually has a few Soyeries and Soyfarms, sometimes even a snail farm or two to compliment the 1 or 2 jewelleries that are always there.
In short: E-cells > Soja Beans > Soja Husks > Maja Snails > Jewellery.

[Zoran]

For me it's Antigone Memorial. Solar->Wheat->Cattle

[Laptop]

Herron's Nebula is okay, but there are better ones than that one.