I love the whole perceived value of things debate.
Whenever anybody in my family has a yard sale they always ask me to put a junk drumset in the yard, some tiwanese pile because it attracts attention. Twice I have sold sets I diddnt intend to because I purposly put too high of a price on them. One time I just kept saying make an offer and never sold it.
When emptying out my parents house we put an old refrigerator out with a free sign on it and it never moved. A week later we put a $50 for sale sign and left it out overnight and it was gone in the morning.