It seems that you had little knowledge about Neff sunglasses. Actually, Neff is an American brand which originally produces caps for people, however, they are now focusing on a wide range of products, including amazing sunglasses. Generally speaking, their prices for a pair of sunglasses would not be that demanding, maybe one hundred would be ok. Perhaps you can get some cheaper prices on some websites, such as Ebay and Amazon.
I never bought any Neff Sunglasses. But I know the average price of Neff sunglasses is about $80 in department store. Fortunately, there are lots of discounts list on the internet, eBay and Amazon both offer a lot cheaper sunglasses than real store. And there is another good web names The-House.com, which has the largest selection of Neff Sunglasses and Eyewear on the web. The announced the orders shipped within 24 hrs M-F. 29 years of great prices-selection-outstanding service.
Most importantly, the price of them is the cheapest on line and off-line, for an average $20.