http://longisland.craigslist.org/cto/1818022215.html

Looks like she needs a front header panel but otherwise in great shape.

that might not even be a header panel, but just the bumper fillers. front and back sets can be had on E-bay, new, for $300

looks like fillers... but the side filler areas look "good"...?

i would think all of it would deteriorate at the roughly same speed, since i had experience with my 83 regal.

Not always. It can even be determined by the position it was parked most of it's life. If the owner parked it outside in a specific spot, they probably always oriented the car the same way. The sun is the real killer of those body fillers.

I think I might have seen this at a Brooklyn gas station a few weeks ago... its was real sweet. Only reason I say 'might' is that I can't remember if it was gray or light metallic blue... but how many clean '85ish Rivs do you see cruising Long Island?