(UK) found some old coins, wondering on their value?

Hi all,

I'm new to this sub so I'm sorry if I approach this the wrong way.

Me and my dad went through some old boxes from his youth which haven't been touched for around 30 years today.

In the boxes we found some of the following coins:

2 shillings from the 60s/70s.

A half crown coin from 1948

Some (not sure how many) german marks from the same sort of time period.

Any idea on these values? Won't sell anytime soon, but would they ever be worth anything in future?

I know Germany doesn't have it's own currency anymore so maybe the marks could be worth something? Not sure.

Any help would be really appreciated by myself and my father!

Thank you!