You also need to look at it from an owner perspective.
What happens to the price of your ADM MR2 GT when the market is flooded with a lot of JDM models with apparently lower kms and in better condition?
I do agree some car markets are overpriced, however I would probably sit on the fence here when it comes to the SW20 being overpriced in Australia. They are a brilliant car and should hold their value.
It's a double edged sword. I personally think the SEVS idea is a good thing, and although I think the price we pay to import a car is ridiculous compared to other parts of the world, including geographically similar regions like NZ, we still need to acknowledge there's a difference between cars that never made it to Australia, and cars that were sold here, abeit in limited numbers.
Some models like the NSX were sold in ridiculously low numbers and could allow for limited number import each year without affecting price of local models too much. The SW20 though is a bit more of a touchy subject.
The MR-S manual version should be allowed to be imported though, it's a grade of car that never made it to Australia, but again it would probably hurt the price of local SMT models, which are already at a fair price as it is.
If you take the AW11 as an example however, the price did affect the local models for some period, but now that the car is getting older and fast approaching classic status, the numbers have fixed themselves over a longer period, this also needs to be considered.