Complete under dash heat/ac case not A-body

Brought to me this morning. I used compressed air to get some cobwebs off it. It's been in storage for about 20 years. I'm surprised at how complete it is. Original, color marked, vacuum manifold is present, along with the push button switch assembly, etc.. All of the doors and their linkage seems to be in working order. I haven't tested the vacuum servos or anything else for that matter. The owner says it was all working when pulled.
He suggested 100 dollars as asking price. I reminded him that the buyer will be paying shipping too and the thing is rather heavy. So... O.B.O. plus shipping from 29642
Thanks FABO