I was originally from Nigeria and still visit the country annually for winter-sun break.
For every genuine business in Nigeria there are about 10 or more scammers whose activities gave the country a bad image.
Although all the oil, gas and mobile communication companies still scramble for a piece of Nigeria business.
I have previously tried to help a member of this forum to secure a Nigerian distributor but the deal fell through cos of pricing.
UK and US are the largest Nigeria trade partners, with China Japan and Germany joining them, greater percentage of consumer electronics in Nigeria are made in china whilst automobile parts are from Germany and Japan.
Don't be discouraged by scammers if you believe there is good market for your products there, google "fendercare" it's a Norfolk based company that sell to Nigeria businesses.
Nigeria government is fighting the scammers but international cooperation is needed to dismantle the strong cabals involved in scam operations.
My advice is to ask as many questions as you can until you are satisfied, request for full payment before shipping and confirm the company's registered business address.