Kain's Ancient Blade
Super Freak
I think SSC did a good job with likenesses for the most part, but when they did screw up, they did it royally. Willow, Faith and Darla weren't just bad, they were FUBAR. The fact that they didn't follow up with better versions of Willow and Faith I think turned off a bunch of collectors. Waiting years to produce a Giles was just the final nail in the coffin. The fact that he's still available on SSC's site shows it was too little too late.
As for limited runs, I think they'd sell too. HT does stuff in fairly small runs which is one of the reasons I think they'd be perfect.
Well then. It's settled. HT, get moving. We need our fix.