I've seen their figures on eBay, too, particularly a couple of figures from the children's TV show that the proprietor references ("Wallace and Ladmo").
I'm looking at their website now, and I agree with Maddadicus, their figures look like recasts, looks like some Britains, and maybe Authenticasts as well (eg, the 1870 Prussians).
I haven't found any explanation of how they make their soldiers.
For the price, you could probably still pick up the originals, or as far as Britains are concerned, you could get the castings from someone like London Bridge and paint them yourself. They'd look crisper than the ones shown on HTS' website. Some of them look a little rough, especially as far as the bases are concerned.
But otherwise, they're not bad, very much in the classic toy soldier style.
Prost!
Brad