35 unopened packs 1974 Topps Comic Book Heroes stickers

35 of 36 unopened packs 1974 Topps Comic Book Heroes stickers (with gum; i opened one to see if stickers were mint; no, i didn't try the gum)
in (only about 2/3 of) original box i bought back then (top of box came off, and i can't find it). Looks like just Marvel guys: Spiderman, Captain America, Thor, etc. Postal confirmation and insurance included. Questions welcome.