What you have is a camera that will work forever.
It will outlive you ... and everyone else in this forum.
I suspect it will survive a nuclear explosion.
It was my grandfather's who apparently bought it in Japan. And never really used it, never really learned. My grandmother asked me to sell it, but I was trying to find some info on it first.
What you've got is a very nice kit. The F2AS was THE top of the line pro body from the late 70s; it was the last fully mechanical pro body from Nikon. The silver body isn't as collectible as the black, but that's a nice metered prism, and I suspect if you sent it in for a CLA (Clean/Lube/Adjust) and had it verified as working correctly it would bring several hundred on eBay.
The "as" version of the nikon f2 is the most desirable variant, worth about twice as much as a regular f2. Value is around $275-350 for the camera. The 50mm 1.4 lens is worth about $120, the others not so much.
All and all your kit has an auction value of around $550-600.