100% agree with this. I worked on Wall Street for almost three years, and ended up with a good idea for mortgage bond analytics software. Most jobs out there use some antiquated, terrible, but really expensive niche software. Most people would love to upgrade to something better, but there's often only one company in that particular space.

The following article provided some helpful inspiration for me. Hope you enjoy it:

http://nukemanbill.blogspot.com/2008/06/how-to-sell-your-sof...