eBay is nice because it has a huge audience. But eBay costs the seller for the posting, commission, and the credit card (PayPal) fees. Craig's List has a much smaller audience, but it is totally free to both the poster and the buyer.
I listed my CD Changer (thank's iPod!) and some old cell phones on Craig's this weekend. And then I waited for replies. And do you know what? I got a LOT of replies - about 10 in one day.
To further ease the burden and cost, Craig's List is a "local thing" - no shipping required. The only trouble is connecting and exchanging the goods. And in the best case, the transactions are in cash.
The CD Player sold (yay!), and my cell phones grab tons of interest. [Note that all of my net reciepts from eBay and Craig's are slated to go to charity.]