Two comments on nickel plating....
First, some people experience contact dermatitis from nickel plating. What a drag it would be to find that touching the tuners or tailpiece irritates your skin! You might make sure you're not one of the unfortunate few who are nickel-sensitive.
Second, in my experience with nickel-plated saxophones, the plating tends to cloud over time. I have in mind a sax I bought just before I got married, 37 years ago. It doesn't happen fast, but it does happen.
When I ordered a custom Rogue, I specified chrome-plated hardware. This was because of the clouding issue.
As for cost, well, being a wealthy college professor, I didn't notice :-).