Groupon site is offering a Garmin 410 with a heartrate monitor for $199--a $100 savings. I bought my Garmin 305 last year for $135, so this is the newest, nicest one for just a bit more than I paid.
If you are looking to take your running to the next level, this would be a great investment! I love tracking my paces and knowing the distances are GPS calculated. Having this info on my wrist while I'm running helps me run faster and also helps me pace myself better on longer runs.
Later this summer I'll be training for a November Half Marathon, and my goal is sub 2:00. In 2011 I ran this race in 2:09, without the help of a Garmin.
Seriously. Don't hesitate.
Go for it!