I'm a GT5 beginner and currently I'm at level 15 and want to finish the beginners series (a-spec) and need a good and fast Japanese classic car (<1979). But I can't buy one or I wasn't able to find it in the store. Does anyone know how to obtain such a car? I already bought a used Honda S500 but it's maximum speed is much to low to win on the Suzuka circuit.
Using the http://gt5cars.net/cars website you can view and filter all cars available in gt5.
In this case, you can filter all previous 1979 japanese cars, ordering by Power / weight.
There is no cars in the "new cars store" with that criteria, but you can find in the "used cars dealership".
In that case, I recomend you to try other races (seasonal events, another series a-spec) and inspect the used cars dealership (It refreshes after every race).