The extremely high cost alone would be enough to deter me. That being said, I have the first and second generation of the Edation “Hot Stuff” bodies (probably impossible to find at this point). The 1st generation was as MX-V explained, very spongy, had a ratchet system skeleton and very hard to work with. The wired fingers and toes was interesting, and especially for the fingers I ended up getting a very small square dowel to “bend” the fingers around to give the fingers “knuckles”, otherwise bending the hands without just made the hands look weird.
The 2nd generation (which honestly IMO still has the nicest overall appearance of a human body), was less spongy than the 1st, but leaches “oil” badly and constantly feels slimy. Not something I would recommend for the cost.
But like the bendable hands that sometimes come with figures (Soldier Story used them quite frequently for figures that had removable cloth gloves), I don’t recommend them. The more you work with them, the wires inside tend to break and then poke through the “skin”. As much as the overall look of the entirely seamless bodies may be an attractive element, no one to date has figured out (as far as I can tell) how to make them any better than TBLeague has. It’s up to you what you do with your money, and the information provided, but I would definitely NOT order from sunnymayhair (the last listing link you posted above), as they have been pointed out on the frequent “scam ebayers” threads on this, and other forums, lately.