Most large-scale retailers and specialized medical stores sell heart monitors. They can also be found online on sites like Amazon.
Almost all large-scale department retail stores sell heart monitors. Most stores that cater to health and well-being will have them, as well. Pharmacies will have them as well as most other pharmaceutical stores that sell medical supplies. Quite a few sporting goods stores and exercise stores sell heart monitors too as keeping heart rates up is an important part of exercising.
In person department retailers
Retailers that sell a multitude of things generally sell heart monitors, like Walmart, K-martand Target. Most pharmacy based retailers such as CVS Pharmacies and Walgreens also will have heart rate monitors since their focus is improving health.
In person sports retailers
Many sports retailers will carry heart rate monitors since heart rate is important to working out. The American Fitness Store, Dick's Sporting Goods and Sports Authority are some sports retail stores that sell heart rate monitors.
Many retailers choose to sell heart rate monitors online as they can offer a wider variety of products. Heart Rate Monitors USA claims to have every heart rate monitor model made in order to provide optimum choices for consumers. Best Buy sells heart rate monitors online because they are electronic, but there is not enough demand for them to sell in their stores.