We have a huge 1984 Olympics Pins collection that we are liquidating for an avid collector from Los Angeles. She has at least one pin of practically every collector pin issued at the 1984 Olympic Games, and multiples of many.
This is a work in progress, because there are many, MANY different pins available.
According to Wikipedia, athletes from 140 nations competed at the 1984 Los Angeles Games.
And even though the Soviet Union boycotted the games (along with most other Warsaw Pact and other Communist and Socialist countries), there were souvenir pins issued featuring the Soviet Union flag (and I want to note that we have some of those pins).