you could be looking at up to £1k on most of those though it's very fickle at the moment. A figure sell for £1k then a few weeks late the same figure comes in at £600
A Luke Bespin sold for £2k a while back and everyone thought that was overpriced. Then one sold for £5k the other week!
HST is probably the rarer of the ESB characters you listed. So currently I'd have thought £1k would be the starting point
Ben is one of the more common 30 backs Star Wars characters, but still, probably rarer than the others on that list. It's a hard one to value. The last two I know of that sold were back in 2004. One went for £900 the other went for £1k. Though I really don't think that's anything to go by though. They were sold alongside other 30 backs which were around £4-600 depending on character, so if you consider how much some of those now go for you could increase the Ben from £1k in a similar amount. It's still just a guess.
The problem with Ben is that he debuts on a 12 back, so debut collectors are more interested in the 12 than the 30. On the other hand he's rarer than the 12. I'd start at £2k and go from there.
