800 cfm thermoquad

I have an 800 cfm thermoquad for sale that I will never use.
Carb number is 9007S.
I rebuilt this carb 20 yrs ago and never used it.
It will need a complete cleaning and going thru since it sit so long.
Asking $50.00 or trade for a holley double pumper and cash difference.
I am located at 26301
Thanks