With more than five pages of items, a second shop wouldn't be a terrible idea if you don't mind it. It seems to have a solid style of its own.
For tags, on:
http://www.etsy.com/listing/98323826/jewelry-brooch-vintage-button-shades-ofI noticed that you have the tag "brooch broach" and the tag "brooches broaches." First off, you are not supposed to tag items that way, they should be phrases that make sense or individual words. "Blue broach" is fine, same with "metallic brooch." Second, I have found that Etsy searches usually have the item show up whether someone searches for the plural form or not. I had an item tagged with "short chain," and it showed up when someone typed in "shorts" and most others have worked that way so far. So get rid of your tags that look like that, because they mean you'd show up highest if someone typed it in the way you tagged it, which I don't think is as likely as them just typing "brooch."
Some suggestions I would give for tags for this item are:
"blue felted brooch"
"navy button broach"
"upcycled jewelry"
"retro brooch"
"sky blue jewelry"
"rhinestone brooch"
You can use www.craftopolis.com combined with Google Analytics to track exactly which tags on your items have been searched and which have not more easily than on Etsy, and it shows you which page they found your item on. This makes it much easier to know which tags are keepers.
When you are not sure which combonations of words would be best, type in a word that describes your item in the searchbar. The phrases that pop up have been searched for recently, so use one (or several) that applies to your product!
The first three words in the title should ideally describe your item on their own. Blue Button Brooch, Upcycled Vintage Brooch, or something along those lines would be great. Then you want to take one or several phrases from the title, and copy them into your tags as is. So if you picked "Blue Button Brooch Vintage Jewelry Shades Of Blue Cornflower Royal Navy Azure" as your title, you should have "Blue Button Brooch," "Vintage Jewelry," and "Shades of Blue" in your tags.
For SEO, you should take one phrase from the title and use it at least three times in the description, or so I have heard. I would not do it if it didn't work with the description.
I noticed that for
http://www.etsy.com/listing/65147265/zippered-shouler-bagthere is a typo in the name, might want to add that d.
For pricing, always price it at what you are comfortable with. Other people's advice can be nice, but it really comes down to what you want/need to be paid.
On a more positive note, your photos are lovely, not blindingly white at all, but enough to make your items really stand out.
