[huhtenberg]

I was going to say $19.95 (which is a de facto standard for moderately priced installable software), but then I read your description below and I think it just won't sell.

Expecting people to pay anything over $5 for a command line tool is unrealistic. And if it is priced at $5, then it won't sell because $5 is just not worth a hassle of paying for the users. Unless, of course, there is a streamlined purchasing mechanism. One click checkout that pre-fills the credit card info and such, but again that's not an option.

I would strongly suggest creating a GUI version of the tool and then it may have a chance of selling at $10 to $20 range .. though again .. know thy customers - people who make the ammunition at home typically do so because it cuts their costs. This means that you will need to somehow convince these cheap bastards that your app is worth paying for, and it's not an easy thing to do.