For example, Nigeria is an English speaking country that uses PAL TVs and 240v power, so why would someone want a used NTSC 110v A500?
Because as most modern european TV it can handle 60 Hz mode, and play games at their real speed without a huge black line at the bottom...
If you want to make a "safe" deal with such a country :
1 - make a huge S+H registred with UPS, FEDEX, or EMS (Chronopost) in the fastest way.
2 - Never accept Western Union pay check
3 - If the money finally arrive on your bank account (you never know), WAIT !!!!!!!! Your bank may not check it well enough during the first 3 days (they have only receive an order, not a real bank transfert !!!), so wait at least 10 days (up to 1 month), that your bank take the time to check the origin (stolen cheque ?) and get the real money !! If your bank didn't get the real money, then the transaction will be aborted and the unreal money will deseaper of your counto ...
You can also add Australia, Japan, N-Z to the safe countries ;-)