1908 Bolivia and 1927 Brazil Non-defaced coin dies

Hello,

I’m trying to find out the value on a couple of old non-defaced coin dies that I picked up on eBay some time ago. I think one is a die and the other is a die hub. See the pictures below. The first pictures are of a 1908 Bolivia 50 Centavos die and the other pictures are of a 1927 Brazil 2000 reis die (hub?). I’ve done a lot of research but I can’t seem to find any information as to an approximate value of the dies (are non-defaced dies just that rare?). I’ve shown them to several friends that are also coin dealers and they all agree that they are real and original but none of them had any idea as to what the current value is. Depending upon the value, I’m thinking about selling one of them but I would like to know what they are worth before I try. Any and all information on the subject would be appreciated. Thanks.

-Kyle