Microsoft Visio Professional 2021 for Windows is on sale for $19.97 right now (reg. $250) through May 22, its lowest price to date. The diagramming tool simplifies complex data with easy-to-understand visuals, and users can get started with pre-made templates, diagrams, and stencils to create flowcharts, org charts, or floor plans. You can also access templates not available in Visio for the web, auto-generate org charts from sources like Excel or Exchange, link data to live internal or external sources, and use touch-enabled devices to create and annotate. This license is for a lifetime subscription that can be used for one PC, including all the features of Visio Standard, plus additional templates, shapes, and collaboration features, enabling you to build and validate diagrams supporting industry standards like BPMN 2.0, IEEE, and UML 2.5. 

You can get Microsoft Visio 2021 Professional for Windows on sale for $19.97 right now (reg. $250), though prices can change at any time.