Love the idea. Just hope that it will be sustainable. You could also look into being a local dealer for companies like Cooler Master, Antec, etc. Campbell's was a Cooler Master dealer and I had a decent PSU from them in the past. When I check now they only have entry level things which can't run my system.

Import fees are other things to consider. Hate customs.

Another thing to do would be an online store. Have clients use a ticket system for tracking and offer delivery to the available local couriers to provide an Islandwide service.