Pricing is certainly a very individual process, it would vary not only for your skill level in your craft but also overhead cost.
This will certainly vary shop to shop,taking into account how much an artist spends not only on supplies,but also tools,software,advertising,web design,shop rent,training classes,etsy-paypal-credit card fees,employees etc.,etc. These are all things that should be considered into prices.
As far as the charge for actually making the piece,well that just depends on your skills. If you just started wire wrapping, it might take you 2 hours to make something that would take you 30 min. to make years down the road....and the craftsmanship would be 100% better. I don't think anyone could really expect to charge a big price for beginner work,no matter how long it took to make it. As beginner,intermediate I think it would be best to price low and pay for your supplies(or atleast help) and keep practicing,don't really expect to make a big profit,it is a process...like college.A college student that has taken 6 months of classes can't expect to find a job paying the same as someone with a master's degree. It's a process of learning and patience.
I am happy to see all the hobbyists/beginners on Etsy,they charge dirt cheap for their work,then people who can't afford a more couture piece still have a low cost option for wire jewelry, I think we all work together in that way.
As far as myself...wellll I make enough to cover my costs....finally.But that's it (taking into account I just opened a stone shop and have lots of extra cost) I will probably give myself a raise in another year. But I do lovve what I do,and I'm patient. I know I can't wake up and be "master" , but I will be one....and you better believe I am going to pay myself for that ;-)