That's why I asked him to get an itemized invoice if possible. Basically, list and quantify the resources and then compare costs.
In his case, he mentioned:
i. 6' pf dish (costs ~9.5k Luthuli; an 8' pf will cost ~25k).
ii. V7 Combo decoder (~7k).
iii. C-band LNB (~2k).
iv. Astel RG-6 quality cable (~30 bob per meter).
v. F-connectors (~10 bob a piece).
vi. DiSEqC switch (4-port will cost ~400/=, unnecessary for a single sat/ LNB installation like his).
vii. Labor/ installation costs (negotiable).
viii. Miscellaneous costs (e.g transporting dish from shop to installation site, preparing surface for installation mount if not already available, etc. Cost not fixed).