A day attack with a DDoS booter cost $60 and can cause $720k in damage. A DDoS attack that costs US$60 per day could inflict as much as US$720,000 in damage to the victim organisation. According to Arbors ASERT Team, a booter attack could cause US$7.2 million in damages a day, costs that could be drastically reduced by the adoption of DDoS defense solutions. DDoS services are called booter or stresser services and could be sold as would-be legitimate tools for security professionals to test the resilience of their infrastructure.”]
Source: http://securityaffairs.co/wordpress/45016/cyber-crime/rent-ddos-booter.html