I went once some time ago and it was a real mix of sellers with a lot of clock parts, books, tools etc. There one or two interesting sellers but they were either over priced or selling incorrect watches probably made from a mix of parts or both. Best to know exatly what you are looking if you are planning to buy and in my experience, you need to know a lot more than the seller to get a bargain.
regards
Paul
www.heuerworld.com