CodeCanyon, like ThemeForest and other Envato Marketplaces, has made available some complex and time-saving code at a competitive price. In their words, you can search for:

PHP, Javascript, ASP.NET and Java starting at $3.

It’s a place, especially, for the WordPress user/designer to explore premium Plugins.

Who knows, maybe an item in their marketplace will be just what you need for your next (or current) project.