90 k miles ? You've got another 10 k to go, before they're fully broken in.
Mileage has never been a deterent for me, when purchasing a vehicle.
The overall condition ( and I don't mean just a quick detailing job, ha, ha, ), tell me all I need to know.
I'm sure you're competent enough to look for the obvious care or neglect items ( maint. records, signs of frequent oil changes, gum wrappers, stale potatoe chips.you know what I mean.