I paid $25 with shipping for the Brown snake Yoda variant. (The cane is a different color too as is his skin tone, and maybe something different about the eyes, not sure because he is not in hand yet) I generally don't like to pay that much for the more standard variants, but some you just don't see that much and this was a nice copy.
Yeah, the green snake variant may be subject to some conjecture, just like Blue Smock Ugnaught (Which I personally believe is a legitimate variant, not a color degradation). I guess it depends on your own point of view.
There are definitely some eBay autions out there for the Green Snake version, and the photos I have seen look legitimate, but who knows?
Variants are a slippery business, it's really difficult to gauge the legitimacy of a lot of these things because there are just so many out there but not a lot of corroborating evidence.
So how much is too much for a minty loose Sand Skimmer?