Jomashop via eBay offers the Puma Unisex Pulse Digital Heart Monitor Watch
, model no. PU910541006, for $39.99
with free shipping
. That's the lowest total price we could find by $10. It features a plastic case, rubber strap, quartz movement, heart rate monitor, 10-split memory, 99-lap counter, countdown timer, and water resistance to 165 feet.