ToolBox writes:  

One of the most interesting modules for semi-commercial web-activies is Classified Advertisement which enables your site users to sell and purchase products in a direct but individual fashion. This Classified Advertisement module for PHP-Nuke has been developed by an Indonasian Nuker, Sudirman Angriawan. NukeKorea Dev. team has been watching this module since he released 1.0.
Recently, NukeKorea Dev. team decided to add three categories of enhancement while recognizing the problem in Nuke C module. First, it works only with MySQL although PHP-Nuke supports major convient SQL engines. For instance, all Nuke C versions have no compatibility with MS-SQL or Postgress.

Second, it has too many security holes probably because Nuke C project seems to start under old version of PHP-Nuke and plain PHP-Nuke. This issue, definitely serious in that it will be exposed to Hackers who cheat Nuke C information, posters, and buyers. As long as it turns out to have semi-commercial purposes, it has to keep PHP-Nuke site users' selling and purchasing activities secure.
Third, the current Nuke C php scripts does not work properly under PHP-Nuke 7.6/ 7.7/ & even 7.8 versions. To make it worse, security patched versions of PHP-Nuke sites have lots of trouble.

Fourth, Nuke C, although it appears matured enough, is poorly structured in coding level to support GUIs.

Respecting the original authors precious and hard work, NukeKorea Dev. team decided to operate on this great module: Enhancement tweaking. This enhancement tweaking is comprised of
recoding DB codes
recoding it to enable Nuke C to run in many PHP-Nuke versions
enhancing it to appear as a tight and compact GUIs
adding security codes
fixing all bugs which have been found the most recent versions

Working Demo: http://www.nukekorea.net/modules.php?name=NukeC30
More Information: http://www.nukekorea.net/modules.php?name=Content&pa=showpage&pid=128
Screen-shots: http://www.nukekorea.net/modules.php?name=Content&pa=showpage&pid=128

Download Information: this tweak version is only available to nukekorea club members at this moment. This Release candidate will be in public for all plain phpnuke versions