The good news is I received an email this mourning and the customs paperwork mentions cost of the appraisal service only so I will pay only tax on this at the post office,

This means I do not have to cross the into the u.s and return with the package and explain at customs,

Now for my question,

I will be submitting several high grade 1955-56 Parkhurst cards valued at $499 and under, but there is one card that should be valued over $800,

how can I submit it along with the others and have everything returned to me in one package?

can I just declare it's value at $499?