First example which just popped up:
http://providence.craigslist.org/cto/5969453004.html
The formula is pretty simple. Relatively short listing description, usually resulting in a very nice example, often low miles, and a single picture. Plus obviously a too good to be true price.1996 Impala Providence.$3500 - $3500
1996 impala SS like new -cd player holds 10 cds -borla stainless steel exaust magna flo cats k&n air charger filter auto start alarm. car has been garaged since new paint is like the day I bought it never seen snow. car has 47000. original miles.
I think the Tahoe has a better chance of being real than this - this would qualify for an impulse buy. The value of this car is at least twice the asking. Probably more like $10k.