917-30 Sunoco Promo Kit

[URY914]

I have a Sunoco promotional kit from '73 for the Penske 917-30 in very good condition. My dad knew someone who worked for Sunoco at the time and they gave it to my dad to give to me. It is a full color folder with inside pockets with loose pages of spec's and info.
I also have some news letter type material which Sunoco put out during the season that has pictures and reports on races. These are in black and white and are printed both sides.
Does anyone seen these and know what these are worth??