Well, the transition from lead to figurine is a huge value-add, and remember Reaper (if the name doesn't raise too many hackles) started out doing trophies, medallions, etc, and ditched it all in favour of figurines.
My "$10 per figure" is from the perspective of someone wanting to pick up a few extra figures. For a box I'd be looking for better figures per $.
So we got 8 UNE commandos, they're all single-piece, 10 nightmares, single-piece and pretty lightweight, and the Fiend, assuming you just go for casting from the original moulds; or that hypothetical new moulds are for single piece figures (could be a good idea, IMO, nobody likes gluing stuff together). So, 19 figures, let's call it 20 to represent the fiend. At $100, average kickstarter dude calls that $5 a figure.
EDIT: the model I linked to earlier has extra arms and an extra head in the blister, so actually $8 for a UNE trooper with separate arms, example, the TOW-7 trooper, might be $6-$8 and guys like the Commandos and most of the Nightmares might be cheaper, say $5-$6... which lands the box right back in Clark's $100 range (but doesn't account for boards or books, of which I know nothing).
ANOTHER EDIT: I followed a small KS where the guy contracted out to have the models cast in resin, due to tin prices, but by the time miscasts etc were accounted for, he wished he'd done it all in pewter