I bought a set of blue anodized usd forks for my newly acquired 89 K5. Upon receiving them I noticed a few things. First of all they are genuine Pro Circuit tuned forks used by Sheak when he was on the team, it has his name and settings still on both tubes. Second of all, unfortunately, they are off of a KX125, not a KX500! I was hoping to have usd forks for this bike, but now it seems it isn't happening with these forks. The question I have is, what are these things worth? And, how much is a set of proper usd forks worth for my 500?