Does anyone have ideas on how to make a patternless black/very dark snake other than the methods mentioned?

so far we have:

super black pastel / super cinny / 8-ball <--- prone to known defects
super GHI <--- genetically sound but expensive
super mahogany / SUMA <--- genetically sound but expensive

more ideas, anyone?

Also, if someone could come up with a price, doesnt need to be too accurate, for a pair of mahoganys or a super mahogany, and the same for GHI, that would be nice. Then i can estimate how many more years it will be until its available for me I have some ideas about the price of GHI, but mahogany is hard for me to grasp because its sort of like an expensive underdog gene. Expensive and nice but the market is rather small and few people care about it.