What is the value of a mint blow up seat cushion from the 1972 73 74 World Championship and is it rare?

Answer 1

Vintage 1970's era stadium seat cushions in general sell for about $10.-$25. The Oakland A's had emerged as one of Baseball premiere dynasties in the 1970's winning the World Series in 1972,1973, and 1974. The three seat cushions you have commemorating the three world championship years should hold higher value.

The stadium seat cushions might be rare but so would a collector of seat cushions. The bulk of the value will rely on the fact that they are World Championship souvenirs. I left a link below for Miscellaneous Baseball Collectibles. Check it out for similar items.