How can I buy used items from people, locally, without a physical office?

Question

and without driving to 100 houses every day.

Answer 1

http://www.craiglist.com - you can also sell things and advertise for jobs and such

or if you live in a town that has their own website for selling things, that would be good too. dealing locally is good, especially since you don't have to worry about being scammed or ripped-off.