How to create web listing system? (like amazon, ebay) : <p>I want to create an online listing system, where people can upload there listings and customers can buy them. It's comparable with the main idea of ebay, amazon,..</p>

<p>Basic functionality:</p>

<ul>
<li>Creating listings (uploading pictures, description,..)</li>
<li>Buying-System (People can put items in their chart &amp; and buy them)</li>
<li>Log-In System (It should be possible to login as seller or buyer)</li>
</ul>

<p>My questions: What technique should I use for developing such an online system with a lot of database-queries? Would you recommend ASP.net or Java SPRING for implementing it? </p>

<p>Or what do you think about using Wordpress and Joomla? There are some usable templates, but I would have to customize them a lot. (Is it easy to develop own things in these CMS-systems?)</p>

<p>Thank you!</p>

<p>Marko</p>
