LotFancy via Amazon offers the LotFancy Blood Pressure and Heart Rate Monitor for $25.70. Coupon code "WK3UU9MG" cuts the price to $17. Plus, Prime members qualify for free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping costs $5.78.) That's $10 under the lowest total price we could find for a similar monitor elsewhere. It includes a medium upper arm cuff (8.6" to 14.2"), LCD display, irregular heart detection, and memory for up to 30 readings across four users.