models are fully ready for printing with a guarantee of quality study for a specific type of printing

Not sure what you mean here. This website is a CG model website. It has a specific category for 3d printable models. I personally create models for both CG and 3d Printing. The 3d printable models usually do not contain color or texture, but there are some which can be 3d printed with color information. Usually, the models in the 3d printing category are intended for printing with resin or SLS technology, which can produce much more complex models with little or no support structures required. Especially SLS printing can self-support the shape and structure of the model without additional geometry. This type of 3d printing technology is useful for prototyping or creating objects which can be directly printed as a finished piece of jewelry, or as a prototype for casting (plating). The models in other categories of the website are for CG purposes like game creation or VFX.

well, the fact itself .that this can be printed does not indicate the presence of connections in the model ,depths,thicknesses at which it does not fall apart and the drawing in the model ,down to a small ball ,must be baked ,very often the connections between the objects of their junction are not observed, their section ,the area of this section, the Assembly of parts without technological gaps, and much more .so it is baked but will the final product correspond to what a person sees in the photo, because this area is quite extensive and has nothing to do with architectural design and the game industry.

i had a client that was not happy with my model. he was unhappy that most of data was in textures not in the 3d mesh. The model was clearly for games - in games industry that's exactly what you want. And it was clear when looking at wire frame images of model - its a low poly model. so at the beginning of our conversation i couldn't even understand why client is unhappy with my model :) so main takeaway here is that buyers should look at what they are buying - at the images. ( and sellers should clearly write what model is for and post images ) But yes i thing cgtrader tells that all models are suitable for print, that correct in the sense that format of 3d model could be sent to printer - but it doesn't mean the center of mass, thickness of parts will be ok for print...

I just have a specification for 3D modeling for printing in various areas and I don't make a Fig out of it .but gamers ) as much as I tried to tell myself, do low-poly models for games with textures but the head is not rebuilt )