Amazon offers its Prime members the Spalding NBA Street Basketball in Official size (29.5") for $9.97 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.58.) That's the lowest total price we could find by $15. It meets the official size and weight specifications set by the National Basketball Association.

Prefer Intermediate size (28.5")? Walmart has it for $9.97. (Amazon charges the same for Prime members; it's temporarily out of stock, but it can be ordered at this price for delivery when available.) Choose free Site-to-Store pickup to avoid the $2.97 shipping charge. That's another low by $15. Sales tax is added where applicable. This is the specified ball for women.