Ebay it, and list the shipping as 'actual' so they pay the actual shipping involved instead of a fixed price. Just make sure they understand how much it weighs
Some cities have ebay stores which would handle all of this for you. I'm sure you'd get much more than $100 for it
You could also give it to charity and use it as a tax write-off. They will come to pick it up


You could also give it to charity and use it as a tax write-off. They will come to pick it up
