We (LHS-MI) have the Lionel Milwaukee 18" Aluminum cars, 6-25622/25623, 4-car/2-car sets, respectively. (2011 Signature Catalog)
These are NIB, never removed for display or inspection. The 4-car box has some minor fading of the orange color.
If you are interested, call us: 810-720-2500 M-F 10-8, Sat 10-6, Sun 12-5 EDT. Ask for Ken, Cheryl, or Terry in Trains.
KD