^^^ what he said...
you have to be careful saying 'original'. all of those items are 'restored originals' which most likely contain reproduction parts, etc.
values differ depending who you talk to and who you are selling to (restored items like those tend to have higher values to car-guys and the non-collector; decorator), here is what I would say just based off what you provided...
Air meter: $1500-2000
Wayne 70: $1700-2500
Wayne 80: $1500-2000
MS80 script top: $2000-2500
Thats what I could see them selling for in an 'OldGas' collector type of environment.
