It is always an Overpay and Never Cash.. Usually a Cashiers Check. If they can send a Cashiers Check. They can send a United States Postal Money Order. (Now I don't know how hard it is to counterfeit those but bring the US Government into the picture and bet you get better response)

Here is how the Scam goes..

I had a saddle posted for sale for $950, I received a "cashiers" check for $3500, this guy wanted me to cash it and send him the difference. Turns out he used a third party name. The plan was that he had a "debtor" in Idaho, by the name of (Scam Name) that owed him money and this guy, (Scammer) was sending me the check for $3500, I was to cash it and keep the money for my saddle then send him the difference. I made my bank check the routing number on the check, (they were more than willing to cash it), anyway after I insisted they check the routing number, the bank didn't even exist. This is a scam, turns out the guy is in Nigera and used the name (scammer name always different). Beware