I always kena (is more like I kena them)... Even though is wasting my time, i always play with them, just love to exploit more on their tactics.
So far their tactics :
1) They never approach you via SMS (i dunno where are they, local or Nigeria), now they also approach by Whatsapp, last time always email only. Looks closely at their no, +234 is Nigeria.
2) They will introduce them self as someone in Canada / UK / Hungary or whatever country, and say buying things for their loves ones who stays in Nigeria and ask u ship the item back to their Motherland

.
3) When buy things they will not nego with you, doesn't ask for item's detail or pic, and i found them has difficulties doing currency conversion. Item is RM400, they convert into $225 USD, when i do my conversion at that time was around $110 USD. I believe this is part of their tactics to lure victims in.
4) When it comes to payment, is simple, they doesn't ask what type of payment seller prefer. They just request your email and bank account detail, and later you will receive email sent by their bank, IN SPAM FOLDER (which shouldn't be)!! They make the transaction confirmation email looks very legit, very easy for ppl to fall for it. The transaction of money is like this, just has to give the proof of shipment to their bank, once verified (how they verify? No idea) the transaction will be transfer into your account. In order to make everything seems very legit and enforced by laws, this payment is a so called "Buyer and seller protection schemes", he will told u once he has committed to the purchase, he cannot pull out from this scheme, means he cannot cancel and take back his money, this process is done by bank (Where got this kind of scheme that cannot cancel and take back money???

). He will also say this schemes is valid for 24Hr, and told me to provide proof of shipment within that time. So, they will keep on pushing you to ship the item out ASAP!
5) In the conformation email sent by their bank, look closely for grammatical error which has a lot, they spell my name wrongly
Ways how i exploit them :
1) Ask some general questions, like why would u purchase in mudah, while they live so far away and have much better option than mudah like eBay or Craiglists. They will give some very weird replies.
2) After the transaction is done, last minute told him there are something wrong with the item he is purchasing. Of course he scammer is very generous he still will accept the faulty item

. Like last time, i told him the HTC One X he about to purchase has Wifi issue at the very last minute (He accepted with faulty condition

) and offered to replace him with a fully functioning Motorola Milestone 2, which he accepted and pushing me to ship out the item ASAP

. Come on, for the price he is paying, Motorola Milestone 2 just doesn't worth it at all, yet he still accept it.
3) In the end, boom him with all the point that shows he is trying to scam. And boom back whatever he reply... He summore say i will be investigated by the FBI and InterPol

, luckily he didn't say CIA

. Which until now I am still a freeman and my account still active