Hello, everyone

I am looking to buy a used Golf, and found one 2007 Golf comfortline V 1.6 Auto FSI 25k. How much do you think is reasonable price? $19k to $20k?
Also a bit hesitated, because I heard there will be major service at 4th year, which is quite expensive? anyone can advice how much it will cost for a service involving change timebelt? and how much it will cost to change new tyres?

Thanks in advance