Welcome to Stamp Community Forum, musica!
Nice stamps. The stamps you show are used stamps of Great Britain from roughly the early 1970s to late 1990s and maybe a few from 2000+. The ones I see are fairly common. They typically RETAIL for roughly 3c-10c each. The wholesale value will be less than 2c per stamp. That's US cents.
Looks like a very nice start collection. I hope you will expand on it and enjoy it for the beauty of the stamps -- that is where the true value of a collection can be found.

k