As of September 2015, prices for average-sized red grapefruits vary and can range from $29.99 for a tray of five red grapefruits from Dundee Groves to $31.95 for a five-pound bag from Local Market. The cost of the fruit often depends on the location of the fruit grove.
Prices for red grapefruits also depend on the size of the fruit. For example, Pittman and Davis, an online fruit seller, offers a box of approximately 18 small gem-sized red grapefruits for sale for $24.40. However, the same seller offers large red grapefruits for a price of $19.94 for only six grapefruits per package.