That is one serious time capsule the bike was in!
Sorry, probably not intrinsically worth a lot. It's got stamped-steel dropouts and honestly, nothing about it jumps out and smacks me. At the used-bike shop where I work, we'd probably put it on the floor for sale at 250-300. I'd say its major value lies in being in such spectacularly good shape for a Bike Boom Bike.
You should send pics in to the Old Ten Speed Gallery and you'd be a shoe-in for Old-Ten-Speed-Of-The-Week! The chrome on the pie-plate isn't even scuffed.