1) I think your prices are excellent, however I think customers appreciate variety. For example, if some of your prices could be lowered, then go for it. If some of them took longer to make then others, price them higher! Prices are a reflection of the cost of the materials, and how long it took you to put them together
2) I think your pictures are great! Keep experimenting with different backgrounds and focal points and shot angles, and see what you like best.
3) as far as shop exposure, not a whole lot. however I've made several Etsy friends through treasuries and frankly I enjoy curating items and giving other sellers recognition.
hope that helped!
Gracie