I found a couple more posters. Both are excellent condition originals and have excellent color and no damage, see photos attached.
The 'Service' poster (from Germany) is 18 x 24, and the Laguna Seca poster is 17.5 x 23
I am thinking $40 for the Service poster and $60 for the Laguna, shipped, $100 total to my paypal jabowlsby@gmail.com