Your prices are looking fair to me already- perhaps even too low. I have to agree with the above articles, as they're really helpful and help you on your way to understanding things from a business point of view.
Lets take a look at one of your listings:
http://www.etsy.com/listing/120478049/wire-wrapped-ring-silver-spiralOkay, so if this were mine, I would be adding everything up to create a fair price for the work. I'm in the UK, rather than the US so the currency is a bit different, but you should get the idea of what I'm saying!
I buy a reel of heavy gauge wire, but only use £2 worth of wire. I had to drive 2 miles to the store to get that, so the fuel costs for getting the wire will be removed from any profits I earn as expenses. According to HM revenue and customs, I should get £0.45 per mile travelled to cover fuel/insurance etc.
I work for 30 minutes on the item, and minimum UK wage is £6.19, so that works out as £3.09 labour costs. I also made this ring at home in my office, so heating that room is a percentage of my annual energy bills, which will also be an expense that I remove from my profits.
It costs me $0.20 to list the item, and Etsy will take 3.5% of the cost of the item, meaning I need to add 3.5% to the cost of the item to cover my costs. Paypal will also take a percentage of the money I make, including the money I charge for shipping. These are all expenses you have to add to your item.
At the moment, I can see the price of your ring might allow me to break even. You need to add profit to this amount. Many people consider the price reached then to be a wholesale price, and as the etsy maths suggests, doubling that price to create your retail price :)
I see a few communities where profit seems to be some great evil, but it's not- it's business. Life wouldn't work out too well if we all broke even with everything! You want profits to keep driving your company s you can expand or create more items to sell, perhaps profits so you can afford to buy essentials for your home or save up for a wedding, holiday or special treat.