So I kind of got offered to buy a 540i e39, its a 6 speed car with about 160k kms. Completely stock 2 owner car, shows awesome, has some maint. history records, and its $8k. I've always loved the 5series cars of that era, but are they a headache to own, maybe drive 4-5k a year? Was the expansion tank an issue on these cars as well? Wasn't really looking for one, but damn its a clean car! Is it worth the 8k?