I assume there is no fixed "pricing model" for JND products, I think they decide on the pricing for each piece in isolation - in the same way they decide on Edition Size.
I imagine it's a case of they charge whatever they feel the market will bear - for each figure individually.
I'm at a point now, where JND figures just don't make any sense to me - maybe I was there a few purchases back, but was in too deep to admit it to myself. The fact remains (IMHO) that these are mass produced items, they're not special, they're not art, they're not even particularly interesting - when all is said and done.
JND, like many others, just make pop culture disposable products. I say disposable, because of the transient nature of the inspiration behind each figure concept. Movies, Video Games, Comics - all these things have a shelf life - and these high priced statues will only be relevant as long as those inspirations continue to be relevant.
I'm not talking about investment by the way, I mean relevance to the people collecting these pieces. Sure, you have some real die-hard fans - who "must have" this or that character from their favourite movie or franchise - but I think most collectors are fickle beings, and eventually, what was a "must have" today, quickly becomes a space burden, or a means to liquidate an asset for the next big shiney thing to drop onto the scene.
Right now I have Batman Returns Catwoman, Harley Quinn Platinum, and Madam Yeong on pre-order....and I'm going to cancel all of them - because I've realised that they are - essentially mass produced "trash" - that will not hold my attention, and are not worthy of a slot in my collection. I also see nothing coming out from any brand that I feel would be a worthy addition. On top of that, I'm also planning to sell pretty much my whole collection - it's time to move on, time for something meaningful - subjectively speaking of course.