The best options are: Craigslist or Ebay.. but, there is Pros and Cons..
The GOOD about Craigslist: You can sell fast and have cash in hands, you meet the person eye by eye anywhere (if both parties agree)
The BAD about Craigslist: You might don't wanna see strangers going to your house, (something you can't carry on) , you can have a lot of e-mail scam and hackers, you can sell only in your area, not good and not safe for shipping, only local pickup..
The GOOD about Ebay: 100% protected by Ebay, Paypal system is safe, buying on Ebay can be the best deal today ever, you can sell in the entire US, you can make more money (for bid) than you expect, you don't have to meet the person for selling or buying anything!
The BAD about Ebay: IMO, Ebay and Paypal fees for selling stuff is way too HIGH, you have to be very professional for packing and shipping your goods, some buyers bid from your item IF you have enough positive feedback history, you might not sell for the money you're asking (for bid with no reserve), Paypal requires your bank account info
So you decide..