No, you're not seeing just the dregs on goo-net, but you're also not getting the full detail of the cars for sale.
Search for cars with no accident history (Restoration = None) and have a friend who's fluent in Japanese call the dealer to get a bit more info on the car.
I think it's best to find a workshop in your area and talk to them about sourcing a car. As dr1ft.jp said earlier, they are way more likely to look after you than a car dealer is.
I'm looking at getting a 2nd car soon too, so I'll keep you posted as to how I go.