During my last trip to the US I went to Urban Outfitters to get a few of their nail polishes. One I had laid eyes on was Sea Dust, which is supposed to be a dupe of Deborah Lippmann's Mermaid's Dream - a nail polish that has been on my wishlist forever, but I could never justify paying the hefty 18-22€ price tag. Urban Outfitters polishes in the US are $5 each or $8 for two. While they are not 100% dupes, they're close enough for me, especially considering the price difference. For a detailed comparison of Mermaid's Dream and Sea Dust head over to Mara in Polishland.