The point of NSFW is kinda irrelevant, no offense, I mean I'm open for NSFW stuff and no one has asked for it.
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I really don't like to compare the ways I do things with other spriters, even more when there's money included. But since I perceive you would understand:
There's a big gap between CPS2 style and CVS2 prices, these aren't that different when it comes to technical aspects, these share the same color ammount (16 colors). Even more, CvS is simplier than CPS2, in my opinion, so CPS2 should be the one with the highest rate.
More than obvious that CPS3 should be the one with higher rate.