I've got a 1991 Series-5 PDG, and I couldn't get the thing to move at $300; even with the full 105sc setup and new tires/chain on it. I stripped it down and transferred the parts to an '88 Trek 400 I found in the trash, because the Trek frame is larger, and I was really cramped on the PDG.

(The PDG series bikes had the same frame with different component levels and paintjobs, until you hit the Series-9, which was a Kestrel carbon frame.)

If anyone is interested in a 58cm '91 Series-5 PDG frame and fork, sent me a PM.