There are many more scam postings from that area - Nigeria, for example. Whenever they ask you to send money, you can be sure it is a scam. They will even email you in response to your postings when searching a job on a site like this. They will try to incolve you in a coiple of email exchanges and later tell you you have to pay them a fee.
Whenever receiving such unsolicited mails, be sure to delete them and not to respond to them!!!