That's a good price. Tough to find anyone even willing to do it here, typically over $350 if you do(but shipping to Oz and back would kill the savings). I had a set of forks diamond polished, since they weren't too bad it worked great.
However, most of the external spring Maico forks anymore are pitted bad. I know that some use the Stainless Tubes as replacements, but to me I would rather have the correct tubing.