Where are you located? Can't tell by the pics, so how is the chrome & black parts on the rims on a 1-10 scale? Any curb rash? If so, is it minimum, moderated??? Sorry for all the ???s & thanx for your reply.
Seeing your requests not sure where you live but April 18th rain or shine 9:30 until 4 pm we are having an open house at our Plumsteadville, PA location. I will have between 8 and 12 used GN rims for sale in various conditions.
Its tricky buying used rims any distance because they weigh about 30-32 lbs each when boxed. This can add $60 to $120 shipping alone for 4 rims dpending on distance between seller and you. Chrome back in 1987 was not the greatest and now you add 22-23 years to the mix.
Gbody parts can back this up to rechrome these wheels they have to be cut apart plated and rewelded...not a cheap process.
Nice out of the weather GN rims will fetch over a grand a set. Finding four nice brite chrome ones in the $400 to $500 range may be tough because then you got shipping depending on how far seller is to your location.
Just some thoughts to consider. Wouldn't worry to much about center cpas they are not that costly compared to T-Type center caps.