Selling Clearance Items

Hi all. I have spent hours playing with sideboxes through the Layout Boxes Controller and cannot figure out a way to do what I want.

Occasionally I have an odd item that I want to sell (maybe a custom made tool a customer did not accept). I would like to have a simple configurable box that I can turn on in the left column, enter a description and price of the tool, set a quantity available of 1, and possibly upload a photo. The box might have a heading like Clearance Items and would usually only have one listing but could have a few. It would not be visible all the time, only when I had a special to unload.

I am not a web programmer and it would not be economical to pay my web guy to program something every time I have a $50 item to sell. Is there a simple way through Admin for me to do this on the fly, sell the item, then remove the box as needed?

Thanks.
Here is My Coldsaw Blade Website

Sorry. Version 1.3.9h

I would probably use one of the banner sideboxes for that, or the Blank Sidebox mod, depending on exactly how I wanted it to work.