Check the gearstick, does it say DSG? Being a 05 I'm more inclined to say its a 2.0l FSI auto (not DSG model). Do you have a link to the add or anything for us to help you out with? 83,000kms is quite good, just be wearing based on time (7 year limit) the timing belt and waterpump are due which are expensive.
Totally not sure around prices, I was looking at a 2006 mk5 2.0l manual with sunroof, leather, RNS510. 155,000km for 7k 2 months ago...
Check these out:
[URL="http://www.vwwatercooled.com.au/forums/f23/2005-golf-mkv-sportline-2-0-fsi-109588.html"]
2005 Mk5 Golf 2.0 FSI Sportline
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