I paid £5 or £6 for my Tchibo wrap-around ones, with 3 sets of interchangeable lenses, UV whatever, own case, string for dangling round neck. Excellent, use them on every run - not just to keep the sun out, but keep dust out of my contact lenses. Only trouble is, is that Tchibo only have them in stock for a couple of weeks at a time maybe twice a year, unless they're available from the website.