Altatac via eBay offers the Timex Ironman Cycle Trainer 2.0 Bike Computer with GPS and Heart Rate Monitor, model no. T5K615, for $89.99 with free shipping. That's the lowest total price we could find by $24. It features five customizable screens, hands-free operation, and a rechargeable lithuim-ion battery with up to 18 hours of battery life.