Before my current job I had no idea of the sort of money that corporations would throw at enterprise software if it filled an need.
We have an enterprise product in a under-developed market; in the first six months we pushed prices up literally 1000 fold without any drop in interest.
I've observed this even in competitive markets.
Enterprise is a seriously seriously big money spinner; you're looking at more cash in a single sale than some of the exits we see.
EDIT: and the irony is that most of this software is not particularly hard to build. A lot of it is just databases with a front end on it; the only bar to entry is being able to work your way through the policy document/guideline/law that you are providing a tool for and figure out what is needed. After struggling to throw together relatively complex web apps for a couple of years, this sort of development is almost cheating :D