About to Purchase, high mileage, IMS maybe replaced?

[ryanjboutin]

I'm about to purchase a higher mileage 1999 Boxster base.
The seller is a member here and has a 997, so he's selling the Boxster.

He says he's unsure if the previous owner replaced the IMS bearing.
He also says that the car has not given him any trouble in his 5 years of ownership.

So, the root questions are:
- If a 1999 Boxster with 160k miles on it is still pulling strong, is it reasonable to assume the IMS bearing has been upgraded?
- Or, forgive me if my level of knowledge is low here, am I reading correctly that the 1999 has the dual row bearing and a low attrition rate pertaining to IMS failure?

Thanks for the help.

I first saw the car on CL, then found it on 986forum after committing to buy.
This is the car btw: http://986forum.com/forums/boxsters-sale-wanted/58537-1999-porsche-boxster.html
*Yes, I'll be removing the door decals. lol