anyone have any idea what a left and right gm full quarters, and a gm door shell are worth? thanks for any input

See your local Chevy dealer for prices and availability. Doors were running $1,200 a few months ago.

i have 1 each of the quarters and 1 door, just curious to what i should let them go for

Its going to be whatever someone will offer you. I guarantee it won't be anything close to what you think they should be worth. Sorry, any other answer is just theoretical babble.