That's not always the best metric, particularly when your product is being sold to an entity which is dissimilar to you (see: rich people, medium to large companies). In those cases, they are often willing to pay much, much more than you would.
Many people make the mistake of underpricing because of this.
Relatedly, you not selling to HN posters, people on Slashdot, starving college students, or people who are morally opposed to spending money for software.
I don't mean to step on any toes, but I've heard "$20 is sort of pricey for a business -- why not make it $10?" enough to be skeptical of the advice on pricing from other people, unless they are saying Charge More.
Good point. Your business is a good example of one in which you are able to charge reasonably aggressive prices even to a demographic that is not normally considered monied.
That people are often willing to pay far more than you'd think is certainly not limited to enterprises and the wealthy.
Many people make the mistake of underpricing because of this.