hey mate, I have one RB25 turbo in perfect condition, pulled 195rwkw on my RB20 at 15pounds, but I run it at 12psi all day everyday.
You can have it, how much are you willing to pay for it?
Send me a PM and we can talk numbers
Highflows will of course be much more expensive and more difficult to get second hand, a normal rb25 sells between 200-400 I reckon, no idea about second hand highflows though.
Cheers
Ric