I got a Vag-Com cable from ebay for £8!
If you have £200 to spend on one go for it, but all cables are made the same with the same connectors and wiring in expensive and cheap! Found this out recently with HDMI cables. No need to spend £100 on one when a £4 does exactly the same job with the same quality!
my ebay cable works grand at £8!
DON'T BELIEVE THE HYPE!
Good for you. Thing is there is some hype, the cables that work have an interface built into them. Just a cable with the connectors either end will not work.