There are multiple reasons why some peoples jewelry is more expensive than others. For example, some people don't do hand-polishing. If you've ever stood before a wheel and polished something to a mirror-shine, you might understand why that might cost more.
Some people use a different quality of stones. There are differences, believe it or not.
Some people use 'tubing' to make their items...Versus using a solid chunk of metal to make something hollow out of. Using solid stock instead of tubing will raise the price. A lot. But some people prefer the outcome.
I won't say who does what, or why exactly people do what they do, but when it comes down to it, it's preference. Preference and a quicker healing time. It's a lot like the difference between why one would buy jewelry at Tiffany and Company, when they could go to Super Silver.
“Quality, quality, quality: never waver from it, even when you don't see how you can afford to keep it up. When you compromise, you become a commodity and then you die.”
Gary Hirshberg quotes