I find a pair of gucci retro cat eye sunglasses at http://www.bergdorfgoodman.com/store/catalog/prod.jhtml?itemId=prod58300003 which are priced at $325.00. It is expensive. If you want to buy gucci sunglasses in a cheaper prices, you can go Framesdirect.com where offer many brands sunglasses & eyeglasses at a lower prices. I find that most of gucci sunglasses are about $250. Good luck.
It's a hard question to answer. the cost of gucci sunglasses depend on many things. the cost of gucci sunglasses in different places are different. if you want to buy gucci cat eye sunglasses, i recommend you to try some big and reliable online stores that sell designer sunglasses in cheaper prices, such as Framedirect.com. They are a reliable online store who sells designer sunglasses. You can find many gucci sunglasses there. maybe you can check it out.