as far as your pricing is concerned- you figure out what it is worth and sell it for that and don't listen to people tell you "meh I would make that myself instead of paying that much for it!" or "I could get this for 1/5 of the price somewhere else!" you need to know what your stuff is worth. Materials+overhead+time, no slave labor but the quality of your work should reflect what you would like to be getting for your time
And keep in mind what you are competing with on Etsy and think about what will make a buyer select your items over theirs?
also has felt letter pins for $15 Don't just think about the look of the items themselves, think about you as the maker of them, the service you provide, the quality of your items, and make sure these selling points are made clear to potential buyers
As far as shipping costs, I can tell you that it costs me 2.45 to put my earrings in a gift-wrapped box inside a small bubble envelope and ship domestically to arrive in about 3 days, they don't weight much, but you don't really know much about the shipping until you've done it yourself.
I agree that you could work on your descriptions
I found this to be useful
And your pics, they are soooo important for online shoppers, you should include as many of them as you can for each listing (max 5, using all of them is great!), they should make the customer fall in love from your thumbnail and treasury-friendly is a bonus (I don't think the concrete background does you any favors, I use scrapbook paper for my backgrounds which works very well as long as you pick out simple sheets- nothing that is a 2D rendering of a 3D object for a 2D picture, that just doesn't work....)
The biggest tip I have for your shop is YOU NEED MORE LISTINGS, MORE VARIETY! (I need more listings in my shop too....) You don't even have the whole alphabet here, and what about making themed pins, like for teachers or nurses or somethings like that? What else can you do with this? Something Etsy buyers love is things that are customizable, many of the top jewelry sellers on there make simple a** everyday s**t that uses metal stamping to easily customize jewelry with names, initials, dates, phrases, ect