That's a tough question. Sometimes people place an ad with a real good price in an effort to get people to call. Other times, people place ads with higher pricetags knowing that they will be talked down. I think a good rule of thumb is you should get 10-20% off the price. When I was selling my Scarab(asking price of $16K), I got a bunch of ridiculous offers in the 9-10K range. I basically told those people to go eff themselves. Then one guy who was serious about the boat offered $14.5K and I said "take it home."