You also have to consider another point altogether, because it applies to your platform. Developers might underprice their software because they do not want to spend time supporting it, but still want to make money off of it. It sounds crazy, but I have yet to meet a developer who is crazy about customer service. By increasing prices, they are also increasing the amount of customer service they might be obligated to provide.
The consensus seems to be that this strategy backfires: often the most cheapskate customers are also the most demanding when it comes to support. The only real way to reduce your support burden is to make your money from fewer customers, which means raising prices (whether by a flat increase or by charging for support - the latter works well in some markets where you can release the code for free and make support the thing you charge for).
