Very Low Sell

I was uplaod an item about 15days before and still it is sold just 1 time. I cannot understandwhy it is coming with so low sell can any expert give me any advise how I can increase the sell. Here is the item

It’s quite hard to compete with a banner like this, which offers unlimited themes and plugins for 30-40$ per month…

Well if what you are saying is true, that might harm authors a lot.

With respect this is simply nowhere near the standard, quality and versatility of other sliders/slider builders out there esp the big few options

The mobile performance of both the demo and several of the sliders needs a lot of work and in several cases feels very unfinished in places