I am guessing that it is a position with a Yugoslav company, which has leased an aircraft out to a Nigerian company. Is it the DC-9 by any chance?
If you are unemployed then give it a go if you can't find anything else but I would not move to Nigeria from another job if I were you. The place is rife with corruption and it is simply not safe for those people from developed countries whom are often seen as a target. Many airlines that nightstop their crews in Nigeria have armed guards on the minibus to and from the hotel - which gives you a idea of how bad the place can be!
The money is probably good since not many people will want to go.