Early A-body parts pricing

Rear glass

-If you came to get the one off my parts car - I'd give it away, just so I know it would never get crushed. Of course my glass is in TN. I would say $50-$100 is fair.

headlight switch

-No clue, but I'm sure there are plenty of these around - maybe even still produced?

Dropped centerlink

-$50-$75 is a guess.

manifolds

-So why do you want both manifolds and headers? I would never buy early 273 manifolds unless I was doing a OEM restoration.

I am contemplating getting a whole car for what I need rather than piecing it together.

-I love finding a cheap parts car, I've done it plenty and come out ahead many a times. Sometimes even making money and getting all the parts I needed for free.