you have to check the models you buy yourself IN ALL WAYS - watching previews, watching attached videos, evaluating the description, analyzing the available data. If you bought a "low-quality model" - NO ONE BUT YOU IS TO BLAME FOR THIS!!! People try to provide information about their models as much as possible, so that the buyer CAN MAKE SURE OF THE QUALITY BEFORE BUYING THE MODEL!!! (look AT ANY OF MY MODELS and you'll see everything) . but if the seller did not attach any data for the model being sold, it makes sense to refuse to buy such a model!
Good luck!