http://mapit.ebay.com/home
This is a real neat Web utility eBay has to allow you search a radius in miles around a city, state or Zip Code, for what ever your heart desires.
Considering the time of year, I decided to search for "Frankenstein" in all categories in the city of Florence, SC 29501 with a radius of 25 miles.
Apparently one of my close neighbors or not so close neighbors has a "Halloween Battery Operated Noise activated Frankenstein". Now how cool is that. You know you want it! Go ahead, nobody's looking make your bid!
I could imagine a neat Windows Mobile utility that uses "Map It" and a GPS unit to let users see what people are selling right where they are - complete novelty item of course.
[He looks like some of the guys I work with with! Ha, ha, you know who you are!]