The rate of a $75 Play Store gift card can vary depending on several factors. In the current market, it might not always be exactly $75 in terms of face value when considering secondary transactions.

Some individuals might be willing to sell or trade their $75 Play Store gift cards for a different amount due to various reasons. Maybe they received it as a gift and have no need for it themselves, so they might offer it at a slightly discounted rate to make a quick deal.
However, it's important to be cautious when dealing with the current rate of these gift cards. There are risks involved, such as getting scammed or dealing with cards that might be invalid or have been used fraudulently. It's advisable to only obtain $75 Play Store gift cards from reliable sources to ensure their authenticity and proper value.