Somebody double-check, but it looks like Blacklist Game's Fantasy Series I KS will soon have enough miniatures so you have all the base game HeroQuest miniatures in one purchase. Over 180 miniatures for $65 plus shipping.
EDIT: Terrain's not included, although the doors and scenery pack have good overlap. Reaper Bones sells a torture rack.
The KS is also an opportunity to pick up Altar Quest. $109 for 211 miniatures. Terrain and doors seem to overlap with HQ. Reaper Bones has a torture rack.
https://www.kickstarter.com/projects/bl ... -series-1/