Good way to separate the "tire kickers" from the interested buyers.

I like craigslist. Bought and sold several items within days of posting ads with no issues.

For selling, nothing speeds up the process like lots of high quality pics! Even if the item is something simple...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car