On the other hand his series III will be quite a lot more but imo still more than acceptable
A collected man sold 1 and it was about 4-5 times the original price ( that was a unique piece)
I know they will sell a series I and II too, or they have them already sold but placed them directly to a collector and did not advertise them on their site.
Also in this case I believe the asking price is a multiple of the original price.