I've not yet seen a promotion for DeWalt DCW200B 1/4 sheet sander since it was introduced November, 2019. Lowest DCW200B bare tool prices I've seen are $119 Amazon and $115 Ebay.
Online option if you can live with a DCB203 2.0Ah battery instead of the 3.0Ah battery: MaxTool and Factory Authorized Outlet are offering the DeWalt DCW200D1 for $129 free shipping
Home Depot has a similar free battery promotion but right now sheet sander is not in stock
CPO Outlets has a similar free battery promotion but tool selection is limited
NOTE: If not using the included dust bag make sure you understand this sander has a proprietary dust collection connector that requires purchase of a DeWALT DWV9000 ~$20 to connect to a standard 1-1/4" vacuum hose and both the DWV9000 ~$20 and a DWV9190 ~$15 to connect to a standard 2-1/4" vacuum hose