Hello fellow stamp collectors.
I am an extremely notice stamp collector and only have ever collected for pleasure, not value. I enjoy the history, art work in some cases and always wonder "if this stamp could talk, what would it say?".
That said, I am new to the forum, and signed up mainly to ask about the below, but perhaps I would stick around and knock around a few threads while I am here to boot.
I have an opportunity to make a trade and the individual is claiming the value is high for these items ($700.00 for market, about $2500.00 book value). After some brief research on my end (and thanks to a few posts on this forum) it seems some of these could perhaps be fakes (flat sides based on year etc).
That said, below is a picture of the stamps he is offering in trade for an ipad. Curious to know what I am getting into here. I know stamps can be some what easily forged etc so I am looking to educate myself.

Thanks all and nice to meet you all.