Hi, I've tried looking for a specific thread on the forum but can't find anywhere specific to post so hope this is ok. Im gong to be in the market for an S4 soon and I need some advice on buying a vcds system. I've seen lots for sale on gumtree for around £60, don't think I'll go near those as the used prices on here seem nearer to £200. Is there anything I specifically need? It'll be used on my new S4 which will be a 2012 to 2014 year, and my wife's 2008 a3. Once purchased do I need to register it for access to a database or is everything on the provided software. Thanks for your patience.