I found it was cheaper to by a new decoder and use the free installation voucher to get it installed. Otherwise you will need bracket, arm/pole, dish, lnb, cabling, connectors, cable clips/glue gun etc
It adds up very quickly.
depending on you location you probably would have to buy another dish in 2 years cause its gonna rust . decent bigger 70+cm( better for hd ) will cost you R800 and over for the dish and arm only ( talking aluminium or fibreglass )