That's a good question, I have a similar problem and I think there isn't a correct answer to this.I think it would be better if there were categories in every personal shop so we can sort our models following that sort of criteria, not only low/high poly or printable models, and that the related models that show in every product's page would share the same category with it. That way it would be easier for a customer to get to know an artist's portfolio and to do a multiple models purchase in that shop and style without the need of buying a specific collection.
But I'm aware this is much to ask for. Anyway the models' sorting in this marketplace have room for improvement and I think the developers of this site know that.