Superlights confirm to aus standards, and the GTR light isnt as light as you would think.
That said, they are a cheaper alternative to wantanbe wheels, and If you bash one, a brand newie is only $270 odd away.
I used to run them on my daily, no problems at all.
(only took them off to covert my car back to standard looking specs)
As with buying wheels off ae86 forums, prices there reflect what they are worth in japan, combine that with that most wheels having been discontinued 20 odd years ago, and the poor exchange rate at the moment, stuff gets expensive fast.
I have a yahoo auctions account, If your keen,pm me and I can run you through whats involved and get some qoutes.