Reproductions or Card Proof

[hd4mag]

Hi, 

I have inherited some stamps and and have some that I thought were Card Proofs but know I think they might be Reproductions.

My question is where whould I look up reproductions to see if they are worth anything.

Thank you for your time

[golowenow]

Hello hd4mag,

A couple images would help to clarify. Please post them.