Sorry,hadn't got you question right.
Personally,I think it is quite a challenge to convince most suppliers/manufactuers to sell online. But what is you accept online orders and then complete the deal offline? This works for some guy I know (but he's into hotel booking etc)
I don't know if I'm addressing your question though. I'd say its possible to buy and sell online in Kenya but it's difficult because it is new and you'll spend time and resources to educate people(which I think is key). Also,I think you'll need to package your offer creatively as us Kenyans are generally used to the idea of money as being something you deal with 'offline' :P
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