Your work is good and the presentation is quite pleasing.
I think your prices are a bit too low - some people may think they are stolen. I was pricing mine similar to yours and when I researched the average prices for models of similar quality and increased my prices I sold more, theres a balance to achieve which takes practise - we obviously dont want to overcharge people either and keep the market fair.
The other issue is nearly all of your content is in the flooded market (Im in the same boat). Theres already too much furniture thus not a high need to buy more. Unless you can offer something unique in this catagory will you have an advantage, is it better quality than designconnected for example, can you offer a range of things to suit a style like evermotion etc.
Once you work out the above, the next step would be offer your models in a variety of different formats. Can you ensure that your models look 100% the same in cinema4d, maya, fbx, unreal engine, GLTF? If not you are missing out on potential market places. For example if you had less models but more formats then you pick up more customers as people in other industries can use your products. All of this takes research, so taking a step back from the 3D package to evaluate things can be the most beneficial thing you can do with your time.
A post by @SimonTGriffiths covers this and more posted recently. I suggest you give it a read and think about it.
https://www.cgtrader.com/forum/general-discussions/how-i-sell-models-online
