Ronzi-
I semi-disagree. I've seen many a shop, dealership or not, do the "checkover". Literally it's just a look-over. No special equipment is used to do this and the mechanic might tap and pull on a few parts under the car but thats it! I'm not saying all dealerships or mechanics do this but business these days doesn't warrant allowing a tech to spend 5 hours on a car!
As far as selling the car without proper Porsche documentation...the grand he saves today in labor will more than pay for itself. If a savvy purchaser wants to knock a few bucks off the cars selling price due to not having the car serviced at a Porsche dealership, I highly doubt it would be much at all. Most people just want to make sure the basic upkeep was at least done to the car and a handfull of receipts should be just fine.
Just my opinion!
