All kinds of nice things appear in a college dorm's dumpster on move-out day -- especially if said college attracts a lot of non-local or international students who will be flying. Selling takes a lot of time and planning ahead, shipping also requires time (you have to box it up and take it to the post office or FedEx) -- and it might cost more than the item's worth.
When I was in college I found a perfectly working DVD player in a dumpster on move-out day, and I wasn't looking particularly hard -- only casually glancing at the most obviously visible items in the nearest dumpsters I happened to walk by. I could easily imagine finding $thousands worth of items if you go to a big campus with the right student demographics on the right day and systematically search all the dumpsters.
When I was in college I found a perfectly working DVD player in a dumpster on move-out day, and I wasn't looking particularly hard -- only casually glancing at the most obviously visible items in the nearest dumpsters I happened to walk by. I could easily imagine finding $thousands worth of items if you go to a big campus with the right student demographics on the right day and systematically search all the dumpsters.