What variables cause the Gesha/Geisha coffee varietal to be priced so highly? Being probably the highest priced coffee bean varietal out there currently, it makes me wonder what exactly causes the Gesha/Geisha varietal to be so expensive?

Is it the delicate nature of the plant causing it to yield only in the most specific of climates? Is it due to its availability as a lesser grown type? Is it simply due to it's quality?
Geisha is so pricey because of a lot of marketing true. However it is extremely difficult to grow.
On a farm is Costa Rica this past June the farmer was having a difficult time with his because the root system is not as robust as other Arabicas.
Another reason for the price is that the yields per bush are lower.

Here is a good article on it: Geisha Coffee According to a 4th Generation Panama Producer