From what I can see, The very first coin is not real, it is supposed to be silver. The rest look real but cleaned. I do not think it is worth the price it is at now. Unless the stamps have a significant value, I do not know the value of stamps. But this is just my opinion.
Also without a coin folder or a capsule.. 75-year-old silver coin can't be at that condition... I dunno about stamps too. I am at work and my catalogs not near with me tonight. :/