Are there reliable escrow companies in Nigeria?

Considering the fact that there is a high distrust between buyers and sellers in Nigeria and most buyers will not make payment before their goods are shipped. They would prefer to do pay on delivery. You would think a lot of escrow companies would have come out by now to step in and fill that void.

I have googled and come across very few websites offering such here in Nigeria but I don't quite know yet how reliable they are.

Do Nigerians patronize escrow companies? Has anyone here used one before?