This is for everyone currently residing in Nigeria.
Let me first share a brief experience:
I walked into a business centre very recently to make a few photocopies. In most business centres in Ibadan, dont know about other places, a page costs N2.50 with PHCN and N 5 with generator. On this day, a guy had just made some copies (cant remember how many and his total cost (price x quantity) was N 'something'.50. The guy at the machine rounded up the price to N 'something'+1. The customer insisted on paying the real price and exercised his right to use LEGAL tender.

I know you may say "it's only 50 kobo'; bu thats not my point. My point is that from my observation, particularly these photostat people, Nigerians do not wat to accept the fact that 50 kobo coins are legal and hence prices should neither be rounded up or down. I think it's high time we accept and USE our money, what do you feel?