I have played through Act 1 inferno more times than I can count. I've noticed that treasure goblins seem to reappear in similar areas. Their locations don't seem to be entirely random. For example, every time I've found a treasure goblin in the Forsaken Woods, he is always somewhere on the left side of the map, near the forest edge. The same can be said for the ones I've found in other areas of Act 1 as well. The exact spot they appear varies somewhat, but the actual location seems to be fairly uniform. I think it's pretty obvious that their locations may be predetermined. So my question is: are there spots where treasure goblins are more likely to appear? If so, where? Are there any other factors that may cause them to be more likely to appear?
The Act 2 goblin near Road to Alcarnus still exists as of June 18, though I had terrible luck getting anything from him.
Start the quest
City of Blood,
Lair of the Witch and look around the waypoint to find him, very high spawn chance. If you save a prisoner or two in the bonus side quest, you always start at the city entrance and can work your way around the waypoint area to clear it (and spot any goblins). As always, don't use followers or be really careful and run back once you see a goblin right at the edge of the screen.