Blizzard, if you're shopping online, checkout mitabyte.co.za. But maybe you'll have more joy here if you tell us what you're building, and what price you're getting. And we can give you a headsup if we find anything better.
I've never heard of Mitabyte before, although it seems that their domain name has been registered for almost 4 years now.
Their range of brands that they offer for PC components are very small, and they seem to offer mostly cheap brands, so don't be fooled if the prices are cheap.
If you compare prices, make sure that you compare with the same brand at other shops! Also, I don't know why someone would list a Durban shop if someone is asking for the Cape Town Rectron price list!
If you want to advertise your shop, then you might want to register as a reseller on this forum, or at least put your shop's URL in your signature

There has been quite a few requests for PC shops around the Durban area, so you should really try and capitalize on that, because PC Zone has a terrible reputation when it comes to customer service, and they're the only shop that comes to my mind for the Durban area.
If you're in Cape Town, then rather have a look at Wootware, Landmark PC and Take2. Other online PC shops that you can also have a look at for good prices are: Prophecy Shop, Sybaritic, Titan-Ice & Rebeltech.
I usually just search on the Shop bot sites like Jump, Shopmania, Shopbot & Pricecheck for the cheapest prices, or on Google with the 'site:za' suffix.