Due to the good receptivity of my first reporting in a Brazilian DDO, I am also researching about errors in the Olympic games coins. There are errors in some sporting modalities, some already known such as the Rugby, Basketball and even in the flag coin (London-Rio) . I am posting a variety of broader error in the Basketball coin.
Hi! I don't know about the South American as a whole but there are many cases of coin errors here in Brazil and there is not a massive interest in numismatic yet, so the market is not very good, a coin like this can cost between $8 and $30, but rare cases are more expensive.
Were minted only about 20 million of this sport modality. The great difficulty is to know how many of them are anomalous.The offers are scarce, therefore I consider this coin scarce too.