So, you’re all signed up at WP Plugins.
Here’s some help for adding your first plugin… and how you can make it stand out and generally attractive to buyers.
It’s actually pretty simple, just a few steps.
Look at a great plugin listing, like the WP Popover plugin or the All in One SEO pack, and copy/imitate/get ideas from their style:
These plugins sell well partly because they are well written, use images and bullet points, and tell the user *why* they should use the plugin and *what it will do for them* … rather than just what the plugin is 
Images work well
Make sure that your screenshot image (the one on the top left of those you have uploaded) is attractive as this will appear in listings.
A colorful picture illustrating what the plugin does (like a Google logo/page for SEO) rather than a WP options page or lots of text will sell more plugins!
Pricing, pricing, pricing… in our experience (and we have a *lot* of experience) the most you should be charging for an individual plugin is $39.
It’s not like the Apple app store so $0.95 is a bit daft, but it’s also not a place where you will sell many $50+, let alone $100+ plugins unless they are absolutely amazing!
Selling 4 x $19 plugins a day rather than 1 x $125 plugin per week is far, far better and allows you to grow your userbase / promotion too!
Make sure you provide lots of useful installation information, people look for that before they buy to be sure they are getting a quality product
If you have additional notes, add them, keep change-logs updated and upload stacks of screenshots… it all works!
Let us know if you have any other tips or questions!
We are a few weeks away from releasing a potentially huge and lucrative plugin and have a bit of a moral dilema on our hands after seeing this site…
The thought of selling our plugin and making some cash here per user seems a great idea at first but then thinking a little more about it this would mean we would have to encrypt the code (only slowing down those that want to rip off our hard work) and then we are surely limiting the reach of the plugin by it not appearing in the WordPress repository aren’t we?
Can you sell me your site’s route as I am currently leaning towards the greater good of going the GPL route and having the wider reach?
Our plugin by the way will pay us per user’s ‘acitvity’ as well as each user anyways so maybe this is influencing our decision anyway as we have a business model once the end user has the plugin!
Everything here is and has to be GPL, no encoding I’m afraid.