The title says it all. These three cubimals do tend to vary a bit in price from one another but I think 80k each is a pretty decent offer. From what i can tell the magic rock tends to be a bit more expensive than this so the price isn't set in stone or anything.
I don't have enough extra funds to buy all three so I will just purchase the first two that I can find and then close down the thread.
Merry Glitchmas : )