"Raspberry Rally" Girl Scout cookies are a hot item — if you can find them

A new Girl Scout cookie favor has proved to be so popular that resellers are hawking the treats online for a premium. 

The "Raspberry Rally" cookie is a thin, crispy chocolate-covered, raspberry flavor-filled cookie that the Girl Scouts call a "sister" cookie to the popular Thin Mints variety. 

Although it's sold out online from the Girl Scouts, consumers who secured boxes are listing them for sale on sites like eBay for as much as five times their usual price. For example, one Girl Scouts troop in New York City sells them for $5, while single boxes of the cookies are listed for sale on eBay for between $20 and $30.