Hey, welcome to the world of trying to make money in art! lol
As the guys above say; More models, more images, more images with visible wireframe, longer description including more model information. i.e. texture information. More model file formats, obj, fbx and maybe 3ds are a must. It says animated, where is the video showing this?
You offer only two file formats, obj, and stl. I assume you know it will 3D print? If you do then a few photographs of the 3D print would also be cool, and a good selling point.
Buyers NEED to see everything your model has to offer. They're not going to take your word for it in a single sentence.
I would also suggest that (guessing topology is good) the models in your shop are way too cheap.
I've written a bit about this here on my blog; https://stgbooks.blogspot.com/2021/03/selling-3d-models-complete-guide.html
Also, made a short video on uploading to CGT here; https://www.youtube.com/watch?v=Ma8Iuai8g74&t=59s
I hope these help. Good luck!