The vents are just under 2 inches thick top to bottom. Most of that sticks thru holes in the fender leaving only maybe an 1/8" or so above the fender. The inner pocket of the vent is actually below the surface of the fender, making the impression they are functional, ( they were never functional )
Ok, I did some asking around with a couple guys I know that collect dealer promos. ( I used to collect Mopar promos ) Seems the beige/ white one is worth in the $25 to $35 range. the easiest one to find of the group Red is a little more in the $35 to $50 range.
Seems the Dark blue will easily bring $150 and up ( much harder to find mint )