multiply base price x 91%
multiply options X 88%
multiply destination X 100%.
gives you basic dealer invoice.
it is common for dealers to have to pay an advertising dollar back to GM . can vary, but up to 1.5% or so of MSRP minus destination.
quick summary - yes , go to kelly blue book or edmunds to enter exact car with options to find dealer cost. however neither site recognizes advertising costs or ever identifies dealer holdback. ( which I never expect a dealer to give to me.)
forum dealers often show pricing below invoice after reflecting GM dealer cash programs or general rebates available at the time.
or , very quick summary , multiply MSRP by about 90.5% to get pretty close.
ed foy, cpa
foytoy 2012 torch red grand sport convertible
foytoy2 2005 mag red coupe( although wife claims this is now "her"car