I don't think you have to "attract" buyers, I think it's all about supply and demand just like anything else you want to sell. As iterateCGI says, you have models that are already flooded in the market place and sadly yours don't stand out from the crowd. That doesn't mean they're bad, it just means that the buyer can see 100s of the same models and therefore buying yours would be just down to pure luck. If you don't specialise in a particular area and just want to model whatever, whenever then it is a good idea to employ the analytics to figure out what you should be making.
If you check the most searched for items and the most sold and the number of models available and do a bit of maths you will soon learn that making those items isn't your best idea. Making a helmet for instance when there are already 10,000 of them for sale really lowers your chances of a sale in that area. If you don't have a particular target audience then make models that stand out in a low saturated area.
Good luck in the future and happy winter solstice.