Mostly warranty. You get an extended factory warranty and maintenance,
and the opportunity to buy an extended warranty at reduced price through
the dealer. YMMV, but extended warranties are generally a rip-off.
None. They are required by law to give some sort of minimal warranty,
like 3 days or something... but in reality you don't get much for the
added cost. That is unless youi are buying a certified pre-owned BMW in
which case there are some nice warranty features.
Living in the rust zone (as do I), you may want to consider doing some
long distance shopping, especially if you are looking for anything more
than a few years old. Used cars from down south are the way to go IMO.
In some states, like Washington and California, the advantage to buying from
a dealer is that the car has to meet a state mandated checklist for resale.
A dealer that does not want to put money into getting a car to pass the
checklist will just auction it off.
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