Listing factory is a good software I believe, you should try the trial and get the hang of it first.
It's very important for eBay listings to look very professional, they just trigger higher sales. When a buyer is buying on eBay, one of the factors that converts potential buyers into buyers is your listing professionalism.
Pictures speak volume, especially if you have high competition and your listing stands out, its a win-win.
Also could hire a professional designer to do the job though, will cost a lot of money but is worth it in the long run.