I would say most dealers charge healthy for servicing these days . A lot of motor manus should do the mini tlc thingy for £100 covers you for 3 years.Or take out VW service plan for 3 years i took that on the mk4 gti and they gave me back £500 at the end as my car hadn't had much done do it in the 3 years of ownership.
As for servicing a car yourself these days good luck, out in your drive or road doing an oil change feck that, getting the tools for spark plug removal etc. cars these days are built so that your novice will take them to the dealerships instead of all the hassle of doing it yourself.
If you can afford to buy a 20k+ car you can afford to pay £200 to have it serviced.