The extension can be found here: http://www.opencart.com/index.php?route ... n_id=15151
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Product Special Filter Admin
version 1.0
written by Tamás Késmárki - opencartgeek.com
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Features:
- Filter products with special price in admin product list.
Support: opencart@pappco.hu
Demo: http://demo2.opencartgeek.com/
Admin demo: http://demo2.opencartgeek.com/admin/ (demo/demo)
Prerequirements:
- vQmod (2.4.1)
Update:
- Connect using a FTP program to your hosting/server account and browse the root of your OpenCart installation folder.
- Upload contents of "upload" folder to OpenCart's root folder. If you get file replacement warnings, double check to make sure you are not replacing any critical files (if you had an older version of the modules already installed, you will need to replace the old files).
- Enter OpenCart's administration menu, Catalog > Products and in the price column you will find the new checkbox.
- Save your settings
Installation:
- First you need install vQmod (http://code.google.com/p/vqmod/)
- Extract the downloaded archive
- Connect using a FTP program to your hosting/server account and browse the root of your OpenCart installation folder.
- Upload contents of "upload" folder to OpenCart's root folder. You should not get any file replacement warnings. If you do, double check to make sure you are not replacing any critical files (if you had an older version of the modules already installed, you will need to replace the old files).
- Enter OpenCart's administration menu, Catalog > Products and in the price column you will find the new checkbox.
Compatibility:
This version is tested with OpenCart 1.5.6.*, 1.5.5.*, 1.5.4.*, 1.5.3.*, 1.5.2.*, 1.5.1.3
Version history:
1.0 (20131121):
- initial release
Screenshots:

