A bit difficult to say 'cos service history records aren't everything but for most cars I'd say between 10% and 20% increase. For some exotic / expensive vehicles it will be way way more. Take a look at the prices for W140s for example. Here in Holland I can get a shed for about 2000 euros but a decent one with documentation will cost closer to 10,000 euros (but then condition plays a big part in the price)

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!