How to sell used cars?

As we all know very well the sales of new cars is going down and down these months. Such situation is of course caused by the economy crisis. But how is the used cars market doing? Is it going to benefit now where the rest of the car industry (producers especially) is undergoing a major collapse? I guess the answer would be yes. The price reductions and the promotions will never be as attractive as the prize of a used car, even if it’s only one year old, yet still much better equipped that the promotional version. And here comes the question: how often do you change your car and what do you do to get rid of the old one? Do you sell it on a website or try to advertise it in a local press at the lowest possible cost? Or maybe you just park it on the street with the price displayed behind its front window? What is the best source to sell and buy used cars without being cheated on? Or shall I say it – what is the most credible source? Now car purchasing has become fun again which can’t be said of car selling. How unused should used cars be to attract a new owner? Is it age that matters or “value for the money” aspect or simply the mileage? Luxury or comfort? Model or price? Which model do you think is the hardest to be sold? I’m asking all those questions because I’m trying to sell my old car in order to replace it with a new slightly less “used car”. I’ve never sold a car in my life and with the economy the way it currently is, think I will lose more than I will gain. I know that I’ve chosen the worst time ever to get rid of my old friend but on the other hand I think it is the best time to do so for me personally. Any ideas on what’s the best way to make the most out of it? I’ll appreciate any thoughts or suggestions.