i/l arch 95% 1hit at ulu 1 gives me around 30-35m an hour from equips only. i dont got a door mule yet so this includes walking 3 or 4 times an hour to sell.
I reach 100m/h split 1 hit at skele and npc 40-50m (deppend of the weapond drops tbh). Not counting godly ones. Also ulu2 its a good map if you do teleport + genesis (blizz / shower) at the same time. I reach arround 140-150m total as well just leech / npc. Not counting the godly items as well. But on my personal opinion, ULU1, its the best for npc / farming, since you can reach arround 60-70m just for NPC, since the spawn (This its how its called?) its just awesome.
If you're lower level, around 50-70, I recommend coolies. I average about 10-11m from NPC. If you find any godly equip, you can sell them in FM for a few extra mill too.
I never bought/sold leeches before. Is it normal for the seller to go back to town to NPC items? I would think the buyer will object since it's wasting his paid leeching time.
Normally sellers would pause the leech timer or add a couple of minutes at the end to make up for it. Normally. Sometimes you get scumbags
I get about 120~130mill/hour selling 1hit petri at 50/90. Only 30mill of that is from npcing equips though.