I used to trade a ton on Bnet and enjoyed that part of the game. Sadly between the dupes, bots and RMTing, it became hard to let go of that selffound for a better (but 0 effort) item/rune. When I moved to single player (after originally restarting from scratch here 3 times) I now realized I can just take as many breaks as I want, slowly build up what I want/need. Just about finishing up 10k LK runs which got me all the runes I need for now, so I can finally enjoy building those builds I always wanted. But now instead of trading something I found for a pretty good cookie cutter equipment set, I get the enjoyment of filling all equipment slots with things that I found. It will never be perfect or the ideal setup, but that gives me years of replayability. And on top of that (not pointing any fingers, I swear!), even people here have been caught using certain mods or trading on other sites with more dubious item sources. I wouldn't want to risk giving up one of my self-founds for something someone whipped up in a hero editor.