You have good lighting and colors, better than most people have around here. :)
But there is a little problem with your photos... shooting angle. Food shots, be it spices or other cooked food, they are best photographed from the horizontal level. The style of keeping food on the table and shooting it from a standing position makes the shot look like what you see daily...and thus they aren't attractive enough. A slightly lower angle is always better.
Example, this image I shot has a sale with only 144 views and is very new. It isn't even properly isolated and has a grey background.
Here's an image that was found on the same page with 0 sales and 517 views:
Angles make a difference. You may even try to lie down below a glass table and shoot while someone picks up a spoon full of spices from a glass jar of spices. Such images tend to have a greater impact.
You're doing great already, but get some more diverse content. Work with models maybe. And if you can't, build a port of good general images, especially seasonal.
Good luck! We're all always learning, I sure have learned from your portfolio too. :)
55-250mm standard lenses. Dual tube macro flash and external speedlit...