Forum Moderators: coopster
If it's not so specific, you need to reach a certain threshold before your script is fairly well-known and people actually come to your site to download it - or you need to already have a site that is visited and trusted enough that visitors won't end up shopping and settling for the free ones.
If it really is pretty dang unique in a number of ways, and it won't put too much of a dent in your life writing it, I'd say, go for it - but not just for the financial stake. If it doesn't fly commercially, you can benefit many still by making it open source.