Once the domain of opticians and chemists, many convenience outlets have found good margins and a ready market - particularly for sunglasses in summer.
A number of suppliers, particularly to the forecourt sector will be able to provide you with a spinner with a good range of reasonably priced sunglasses. Many of these will have fashionable designer labels.
In the right outlet (and at the right time of year)these could be a profitable line for you to consider?