Kyb Spring forks are the 09-12 450r model.
.50kg springs is what I was told. I haven't had them apart yet or ridden them. They have some use but look to be in great working order.
I'd replace seals if I end up keeping them. $600
PSF1 kyb forks have 15 total hours on them. These are the good air forks. Very clean like new. Set up by Enzo for fast offroad rough mx. Work very well. Comes with air pump. $600