Where at? Selling on eBay will usually fetch the most but eBay charges a ridiculous amount on fees.
Selling on the for sale forum here will usually get you less but not near as much in fees. So it evens out with eBay but there are a lot less scumbags here as opposed to eBay.
Craigslist is usually the best since you deal in cash and no shipping. That is if you can find a buyer.
My first choice is the for sale forum here, followed by craigslist, then If all else fails I eBay it and hope for the best.