US$149 is really a joke, my friend also bought the white one the same as above only $28.93, it's <$100, and the quality is not bad.
http://www.caseswill.com/vapor-pro-edition-case-for-iphone4-4s-white_p2846.html
i found a blue gevey supreme can unlock All Version iPhone 4 / 4S and got one days ago. it's cheap and useful, http://www.casesinthebox.com/blue-gevey-supreme-pro-sim-card-unlock-all-version-iphone-4-4s_p3825.html