Hi all, I have looked at comments about the GS and why people love them and found it encouraging. What I also want to do is understand how to put a rule of thumb price on GSs of different plates, mileages and extras. Parkers have a guide and is quite helpful but I am sure there is something also to help me work out value of different extras. I would also like to understand what features have been added to models over time. I am committed to buying a GS new or used it is just working out a fair price to pay on an objective basis. Any help would be appreciated.