Lowes offers Kobalt XTR 24-volt 7-1/4-in Brushless Cordless Circular saw for $99 with free shipping. 

Product Description:
Introducing the most powerful line of KOBALT power tools - Kobalt 24V max XTR! The XTR circular saw is designed with a brushless motor that delivers up to 50% extra performance and power to meet your most demanding jobs. While the 2-1/2-inch cut and 56 degree bevel add versatility. XTR, elevating the Kobalt 24-volt max system to new heights.

• Brushless motor delivers 5,500-RPM and provides longer motor life (for best performance utilize a 4.0Ah or larger Ah battery.)
• 0-56 Degree bevel with bevel stops allows for a variety of cutting applications
• 2-1/2-Inch cut depth at 90 degrees
• Electric brake stops blade rotation when the trigger is released for added safety
• Built-in LED work light to illuminate work area
• Fully compatible with the Kobalt 24-Volt max system (battery and charger sold separately)
• Kobalt has a 5-year tool warranty