$200 - Bike restoration, including new tires, new saddle, new brakes, and a thorough chain cleaning
$100 - New helmet, light, bike lock, and bottle holder.
Priceless - Riding your bike in the pouring rain through
this route.
Wow, I mean, I knew that the stationary bike really didn't compare in terms of excercise to the real thing, but wow. I need to get a decent pair of biking pants, 'cause wet jeans make it 3x as tough!