hi all.would welcome any input about the following - found on ebay. audi a3 rns-e chrome s version. includes - code card pin / user manual / gps fakra antena / 4 removal keys / eu 2009 map / 12 months warranty / installation manual cd / commercial invoice / custom vag-com unit coding / video in motion unlocked. comes from poland andis priced at the moment at 669 + 39 p+p .is this a good buy and are they straightforward to install , or is it best to go to someone with installation experience .just found another with max. bid of 255 with 1 day to go.