I would lower the price on those Star Wars items, no professional will buy those as you cant use them commercially (basically those can only be sold under Editorial License), ok for education or hobby. The models sold with Royalty Free License I would actually rice those prices, you have it kind of backwards, so rise price targeting professionals, lower price targeting hobbyists.
The P-51 can be 30 dollars easily, there are lots of P-51 but not as low poly, people filtering on poly count will filter out all those other P-51 models.
Same for the cars and tent, target those for game defs and set them to around 30 or 40 dollars.
The textures on those are great and that's the actual value for mobile phone game defs.
Anyways, if those star wars models sell for that price then maybe keep it but definitely rise those on the pro models.
Also keep in mind if you stay selling on Turbosquid as a non exclusive you potentially lose money. You actually swing some of your own clients to that expensive platform and give them 60% cut to sustain it. Every 3D stock media customer has at least two accounts or multiple and buy at the point they just happen to be logged in and find what they need. Make that point where they find it the point you want to sell it. Don’t believe Ts has a large amounts of clients that look no where ells, its a small number of people, losing those you make up with higher royalty you get at better selling points.