Price of in-vehicle unit should be standardised

While looking for a new car from various showrooms, I noticed differences of up to 30 per cent in the price of an in-vehicle unit (IU).

A reputable motor agent quoted me $200 for an IU (with no opt out), while an IU installed at an inspection centre, like Vicom, costs only $155.80.

An IU is required by the Government to collect revenue on road usage, so its cost should be standardised. Why is there such a disparity in prices?

Chang Pui San (Madam)