I am sorry to say this as Brazil is a beautiful country.
BUT
Be careful in yours swaps there.
Michjack and I (Szmata) made recently a swap with someone in Salvador de Bahia.
Our coins arrived safely (registered letter with AR)
But Michjack and i received from him (also registered letter with AR) the same enveloppe opened with a knife and of course empty.
I made some inquiries ans until now we suppose that our correspondent is a honest person.
Unless you had the same problem....
Anyway, sorry, but be careful
Jean