So, for the sake of curiosity, I decided to follow the selling prices of the commemorative R$2.00 and R$5.00, throughout brazilian auction houses, since they were released.
The R$2.00 was released at R$34.00 price tag, and the R$5.00 at R$420.00
I sumarized it at my blog page.
https://numisbr.blogspot.com/2022/12/evolucao-do-preco-das-moedas.html
R$2.00
R$5.00