eBay - get started now.
Rethink - eBay's guide to getting rid of your old electronics without resorting to the landfill.
iSold It - drop off your stuff and let the #1 seller on eBay do the dirty work.
Auctiondrop - send them your lux goods and they'll take care of the listing for a fee.
Ideal Bite's Freecycle Tip - come to terms with the fact that no one's gonna shell out for your B&W TV? Someone might take it for free at Freecycle.
Have your own tip to add to the list??