sounds like a deal if you can get a PPI so there will not be any surprises right away. If it is a dealers "used lot" the dealer maybe talked into performing the PPI as a way to flip the car.

Add the normal caution to anything they report without you being present when it is done. Most techs will not sell their souls to the used car lot rats. So being present will allow you to build a little connection and most are always happy to share thoughts with people who like cars. It is the whiners that get to them real fast.
I would tell the lot you need a PPI done so you will know your not buying something with the pin pulled waiting for the big bang.

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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green