price value?

[79 blue monster]

I am looking to buy some parts and pieces for a square but not sure if they are worth buying, or not. so if anyone could tell me what these parts go for let me know.
-pair of red 1980's buckets seats(no ripps good padding)
-1980's dual headlight(side by side) core support with lights. are they hard to find?
-a 1979 uncracked grill with chrome strips and chrome "GMC" emblem
-NOS driverside door skin(has 2 dents on body line)
-a pair of metal chrome bumper gaurds(no pitting or rust)
just let me know what you guys think, thanks