What do you look for in high quality leather bands

I'm currently shopping for some leather high quality military/nato bands. And im not looking so much for a specific recommendation (though hey feel free to throw one out if you have it) as tips (or guides?) for what to look for in these.

Style wise you can get a sense from the pictures.

And if it is a trustworthy/well liked place from the reviews.

But I find I don't really know what im looking for in the sense of why one band is 150 dollars and another 30. OR what is a good…

What do you look for in high quality leather bands