Scam Advisory w/examples from CraigsList:
http://www.craigslist.org/about/scams.html
"Recognizing scams"
Most scams meet involve one or more of the following:
inquiry from someone far away, often in another country
proposed transaction includes a cashier's check, postal money order, Western Union, or escrow service (BidPay, Squaretrade, etc.)
inability or refusal to meet face-to-face
It was either on CC or elsewhere, mentioned that Money Orders can be cancelled and after depositing, the bank will remove the funds from your account