Via Stephen Downes and online news list:
Classroom Classifieds Raise Funds for Schools

Residents of Falmouth, Maine can use a new web site --
classroomclassifieds.com -- to advertise things they want to dispose of
and help raise money for the schools as well. Working on the honor
system, users who post ads agree to donate anything from 1% to 100% of
the sale to the Falmouth Education Foundation.

Craig's List and Tribe--maybe this is worth adopting?