ToolNut has the 2460-21 M12 rotary tool kit, with charger and 1.5 battery for $79 today only. Unfortunately you have to get to $99 for free shipping, but they also have some other kits on sale as well. Not super hot because of that, but an ok deal if you can get to $99.
Nope, not fuel... thus not brushless.
This compact, portable and powerful cutoff solution for the professional offers up to 10X longer life and 10% more speed. Get the power of a corded rotary tool in the M12 Cordless Rotary Tool, which integrates high-performance motor design, optimized electronics and REDLITHIUM battery technology for exceptional power and durability. This compact, versatile tool offers a variable-speed of 5,000-32,000 RPM and a collet that's compatible with all 1/32" - 1/8" shank accessories for thousands of cutting, grinding, sanding and polishing solutions. Maintenance contractors, electricians, plumbers and automotive mechanics will find it indispensable for close-quarter cutoff and grinding applications. A variable-speed dial offers fluid control, and the 1.3-pound weight permits hours of comfortable use. Grinder-style exhaust ports and front-bearing protection help this tool exceed performance and endurance expectations. The kit includes one M12 REDLITHIUM battery, a 30-minute charger, five cutting wheels, a mandrel and a wrench.
(1) M12™ Cordless Rotary Tool (Tool Only) (2460-20)
(1) M12™ Lithium-ion Battery Charger (48-59-2401)
(1) M12™ REDLITHIUM™ CP1.5 Battery Pack (48-11-2401)
(1) Contractor Bag
(5) Cutting Wheels