Don.t you hate it when your inbox is clogged with emails from someone
looking to sell something or sublet their apartment? Do you attend
college in a city with no Craigslist or hate sifting through
Craigslist ads to find stuff you actually need (like textbooks)? Would
you prefer to buy stuff from people you know - classmates and alumni -
rather than from complete strangers on Craigslist or eBay?

Why not create a hybrid website of Facebook and Craigslist that allows
students to easily buy and sell books, furniture, or other goods to
students attending the same university? One feature, for example,
would allow members to match their current courses to other members
who took the same courses in previous years, greatly facilitating the
market for used books.