Welcome to the forum Braveheart.
I joined this forum just a little over a week ago and this posting to you will be #82 or 83 - shoot, I lost count

This ios a great forum with a lot of great people more than willing to help out their fellow collectors.
In answering your question, I can keep it simple - all stamps are worth keeping whether they have have a high catalogue value or not. My only suggestion to you, if I may please, is to dump any stamps with scratches or missing corner perfs etc. Apart from that, you have some nice stamps. Other collectors will not want them for trades.
Will be happy to try to answer any questions you may have.
Happy collecting
Bujutsu