Claude Valentini are a faux-luxury brand of wristwatch. Marketed as high-end timepieces, backed up by an impressive website boasting high price tags, the watches are in fact a staple sales item of vendors who operate out of cars at service stations and car parks, and have only a simple mechanism worth £30-£40.

You're being ripped off if you're paying high prices for them.  They're not worth anywhere near what is claimed. 

Refer to wikipedia:
http://en.wikipedia.org/wiki/Claude_Valentini

and BBC investigation:
http://www.bbc.co.uk/insideout/east/series6/car_park_peddlers.shtml