Margo,

Not sure if you are Stateside or UK, but an alternative you might try is craigslist (.org or .co.uk - depending), which are free classified ads online.

Since there are metropolitan/regional "craigslists" (eg, I go to "boston.craigslist.org"), you can specify that there will be no shipping and the buyer will have to pick up. (If you get someone who really wants it and asks for it to be shipped, I like jonm's suggestion -- have the buyer specify shipping.)

This is how I bought my Martin D16-R...got a great price (talked the the previous owner down) and just had to spend a little gas money.

Peter