Suspension lifespan - what mileage to replace?

[23109VC]

I'm looking at used boxsters.

one "must have" item is the M030 suspension.

I can either find a car that doesn't have it, then buy/install it on my own - thus getting brand new suspension.

OR

find a car that has it already.

if I go the latter route - and assuming the car has had the upgraded suspension from day one - then depending upon the mileage of the car, the suspensino may need to be replaced soon.

i've never owned a porsche, but from othe cars i've owned, it's not uncommon to need new shocks by 50-75k.

If I get a nice, but USED boxster, that has 50-75k mileage - am I realistically going to need to replace suspension, bushings, etc pretty soon? if that's the case, then HAVING to find a car iwh the M030 already installedmight be a waste of time if i'll just be replacing it soon anyway...

maybe it would be wiser to find a car that has all the OTHER options I want, the right mileage, year, color, etc... and then just buy/install the M030 and have it be fresh/new.

what is the lifespan of the OEM setup assuming normal driving? (not a track monster that's been abused)