Sounds like you need to do some reading up on Western Union/auction purchase scams
here.
From the linked page:
-------------------------------------------------------
The following scam targets eBay sellers, who may be tricked into shipping goods to Lagos, Nigeria without any payment. First the criminal contacts the seller (usually via a new eBay account, often registered in Singapore) and offers a high price for an item on sale. He or she will request that the item to be shipped to Nigeria via a parcel service (FEDEX, DHL, UPS, EMS) and explains that the buyer will pay via "Western Union Auction Payment (Bidpay)". This is a legitimate company, but that doesn't matter in this case, because it's not actually involved.
The way the scam works is that the seller is told the money will only be released by Western Union / Bidpay when the buyer supplies a tracking number, i.e. when he has already shipped the parcel. To get the seller to ship the parcel, the criminal himself poses as Western Union, sending an email from a free webmail service to the victim using an email address which mentions Western Union or BidPay, for example "onlinebid-pay@accountant.com" or "westernunionmoneyorderpayment@banknotes.com", assuring the seller that Western Union has received payment from the buyer and will release it as soon as he submits the tracking number as proof of shipping. A seller believing this message to be sent from Western Union will lose his merchandise and the shipping costs.
-------------------------------------------------------
Another link on BidPay scams:
http://scamvictimsunited.com/phpBB2/...r=asc&start=0&
An eBay forums thread on BidPay scams:
http://forums.ebay.ph/thread.jspa?th...=1128271952057
An article on BidPay scams:
http://www.kirotv.com/consumer/4709924/detail.html
Another eBay forums thread:
http://forums.ebay.in/thread.jspa?th...=1120725992756
I would also recommend Googling for additional info.