As scriptor-ga mentioned, most sites are unwilling to accept orders
from Nigeria due to the number of fraud experienced in recent years.
I've sent out queries to as many international mail-order companies as
I could find, and I have finally found one that is willing to take
orders from and ship to Nigeria.
Tel.: + 49 96 04 / 40-88 80
Fax: + 49 96 04 / 40-86 60
Conrad International accepts orders from all countries except USA and
Canada. They carry everything that you've listed in your question
(laptop, mobile phones, phones, audio equipment with mp3 playing
capability, etc) except the iPod.
As far as ordering the iPod goes, there are some alternatives
available, such as mail-ordering it from one business and having it
shipped by another. If you would like to pursue this alternative,
please let me know.
I hope this has helped. If you would like clarification on any part
of the answer, please feel free to use the 'request for clarification'