I use Zorra tier8. Few months ago I got a hof for first one to tier it to tier8. So there might be another tier8 one but none above.
I would never consider selling it for under 15k.
Yes, Zorra is not 80% eff. but this should not affect the price dramatically. It's insane great gun for all around at very low skill req. For its lvl and range and dmg it does it is great pvp competitor. Crits kills almost anyone so you're safe mining in lootable protecting yourself. Also its good for LG because of the range. Yet you can hunt all slow mobs without armor. And it burns very few enhancers because it's not fast but dmg is insane. Also once I tier it to tier10 it will be good mayhem competitor.
I would like someone to name me a better gun for 15k to meet all Zorras benefits considering range, damage, small enhancers burn for its skill lvl req.