I think this is the cheapest this one has been. It's the base model so not the HR Monitor or Music model. Obviously It depends what you're looking for in a fitness watch. Reviews for the Spark look good too - (Keep the above in mind regarding features though)See here
Large Model - Here
Small Model -HereSee Size guide at bottom of OPBasic Info
Tracks steps / distance / calories
Works with TomTom MySports app
Wireless syncing via Bluetooth
Compatible with iOS & AndroidProduct blurb
Measure your active minutes
Whether you are tracking sprints, strolls or steps, the Spark Fit monitors every active minute to add up all of the statistics you need. Time, distance, calories burned, steps, pace, everything you need to know about your lifestyle and exercise routines.
With several modes available, it can adapt to suit your training style. Whether you are running, biking or swimming, in the gym or out in the open, it can closely monitor your progress. Providing you with live statistics on the go, you'll know when it's time to push or when to ease back.
With an optional heart rate monitor (sold separately) you can also track your heart rate both on the go and when reviewing your statistics after your workout. (See Link for more info)