This saw is not usually found at retail, it's the newest and smaller version of the Milwaukee battery powered M18 compound miter running 7 1/4" blades. Normal retail is $399 for the bare saw, or $499 for the kit and rarely sells for less without special coupons, etc...
Tool Nut is offering the kit version at an $80 discount, and including an extra Milwaukee 60t carbide tipped finishing blade ($20 value) for free. Just apply the coupon code BLADE at checkout for the discounted price, and the extra blade will be added to your cart. No sales tax outside of KY, NY and VA and shipping is free.
Milwaukee notes on this tool:
This 18V miter saw is currently the only 7 ¼" cordless miter saw that bevels both left and right (both up to 48 degrees). At only 28 pounds (including the 5.0 ah battery), the saw still packs plenty of power, as it delivers 5,000 RPM and can make around 600 cuts on 3 ¼" base board on one charge of the XC5.0 battery. This is one of the most mobile saws on the market, which is great for interior remodels and trim installers. The sliding function allows users to cut up to a 2x8 at 90 degrees and a 3 ½" vertically. In lieu of a laser guide, dual LEDs on either side of the blade deliver a shadow line onto the material.
For the folks who like their tools yellow, the most similar competing solution out there is the DeWalt kit that sells for $350 (https://www.homedepot.com/p/DEWAL...205983654)
however it's run time is about 1/3 the Milwaukee (200 cuts per charge on a 4 ah battery vs 600 with the Milwaukee and a 5 ah) and you only get a single direction bevel vs dual with the Milwaukee. Milwaukee gives you a 5 year warranty vs DeWalt's 3 years.