Regarding that 02cool fan price range.
You have to to be careful and pay attention to the included features. There is more than one model of that fan, the cost difference is based on the feature. The less expensive one does not have a rechargeable battery built into it as well as a USB outlet you can power things such as phones and little lights with. Some versions have 110v cords as well as 12v cords, others only have a 12v power cord. Some versions are DC battery powered only.
The above and where you buy the fan from accounts for the big price difference.
I was fortunate to find a rechargeable version in a Quartzsite thrift store out back in an odds and ends pile. It was caked with dirt and had no power cords. But as is typical of thrift stores they had piles of power adapters and cords. So $10.00 and some cleaning time got me the best model being sold by 02Cool.
That is the second time I have found a 10” 02Cool fan in a thrift store. The first one I found was the basic model. After I found the second one I donated it to a person in great need of a fan who had a shortage of income and a shortage of electrical power. He had been running a tiny 110v fan off a small inverter but that was drawing down his little portable power station battery way too fast. When I saw him 6 months later he said that fan had literally changed his life as to comfort.