All this while I have been searching for a good place to sell digital items with the following features
* Can integrate with paypal payment processor that is easy to set up.
* No monthly fee, free sign up.
* Unlimited bandwith and storage.
* Unlimited upload of products.
* Secure storage.
* Easy to install "Buy Now" button.
* Will not remove products that have not been sold.
First I thought I have found it at Sellfy.com but it only allow 5 items to be upload for free account. This clearly did not meet the requirement I have specify as above. So I did more search and finally found this.
DigitalSellz.com - you can sell anything that you have made or created. It can be photos, plug-in, scripts, songs, videos and other downloadable things. If you can upload it on the site, you can sell it.