Is better to have insurance and if not forced to have tracking device just leave it like that. You only save r50 on insurance while paying over r200 for tracking device.
With most Insurance companies, you with a tracking system, only pay the basic excess if your vehicle is stolen and no additional excess. The additional excess is on ave 10% of the claim (market value of car)
There are basic approved systems which cost R79-R99 p.m. and therefore your statement is incorrect. Most insurers will give you 15% of you premium as a discount if you have a system installed. Sure if you have a cheap Citi Golf valued at R35 000 @ say R220 p.m. them your discount will not be much +- R33. But a R600 000 vehicles premium would save about R200 p.m. and the accepted unit costs from R79.
Sure, I do not believe the stats thrown around about 99% recovery rate etc but hey :
1) You don't have an additional excess
2) You get the discount (most of the time covers cost of tracking unit)
3) If you ever get hijacked there is a better chance
4) Who wants to pay a fortune for insurance being a grudge purchase
There is by the way a new wireless system which does not need any connection into your car and thereby no warranty issues and harder to trace in the vehicle - this is the R79 p.m. unit and is approved.
I have been in the Insurance industry forever, Almost 30yrs, and in my experience, I would rather have a unit then have regret if a member of my family went missing and I would hate to say "I should have" for such a serious thing.
As mentioned before if your vehicle is stolen do you actually want it back after the possibly used it for crime etc, but if someone was taken with the vehicle you surely would.
PS - A few garages have been busted taking exotic cars for joy rides whilst the vehicle should have been in for a service and "awaiting parts" - as a matter of interest.