They retail for $14 here, and $20 something if you order them from overseas because of the unfavorable conversion rate between USD and GBP.
The other is a blackened olive/golden green shimmer from Brucci called Black Emerald. Interestingly, under a microscope this polish has sparse orange and red shimmer mixed in with the dominant green. Indoors it's virtually imperceptible, but the polish flashes a fall leaves-color in direct sunlight (making this polish a gorgeous duochrome. Brucci is based in New York, and I believe on the east coast it is more readily available in drugstores than on the West Coast. I bought this in an independant beauty supply for $3. It is also available on eBay if you can't find it in a store near you. Both of these manis are two coats of polish over one coat Nubar Nu Nails and topped with one coat Seche Vite. These photos were taken indoors using an artificial light source.



