All of my pairs cost £6, with no sneaky extra lens costs or anything like that. They are made of plastic and the lenses need cleaning regularly, but are a fantastic quality for the price. They come with a plastic case and cleaning cloth, and all of mine have taken less than 2 weeks to arrive. I would highly recommend giving
Selectspecs a visit as they have a huge range of frames to choose from, and as you can see, are priced rather reasonably. Where are your glasses from?