I'm also sorry that your car may have to be sold Gilberto. It's always a sad day when it goes off down the road in someone else's hands.
As far as dealer margins are concerned, I have noticed they like to offer about £5,000 - £7,000 below their sticker price for a car. They are a business after all. If you advertise slightly above the 'trade' price and are prepared to drop slightly, you shouldn't go far wrong. It's always nice to sell a car directly to the next owner, rather than to a deale, so you know that someone else will take the same care for it as you did.
All the best with the sale.
