My car had been sitting for a year, and I decided to switch out the battery (which had of course died) instead of having it jumped partly because the old battery was already at least 5 years old, and partly because I read that sitting so long can damage a battery and make it unreliable. I've had the displeasure of fighting with unreliable cars before, and would rather avoid that possibility.
I called Clark's and their technician Brian came out to the Forest and had a new battery (with a 3-year warranty) installed within the hour! He was very polite and understanding.
The price was very reasonable for this sort of thing. 10/10 If I need anything else of this nature, I'm calling Clark's first!