Rich Cutlers site is great for info, but........Im afraid that it indiscrimately encourages RD-1 owners to modify their cameras. Right now Im visualizing some RFF klutz taking off the top plate and poking around inside a delicate electronic system trying to fix something themselves to save a little money instead of sending it in for a proper CLA. Then, not fixing it, damaging something else, and then trying to sell it b/c they dont want to pay for a CLA. I mean, lets leave some repairs up to the professionals.
Also, I dont mean to sound pessimistic, but buyer beware: not only eBay, but RFF as well (sorry guys, I have to say it). For example there was an RD-1 for sale a few months back, they said the camera had been CLAed and everything was great. I then looked at the selling members posts on older threads. They wrote multiple notes on how they needed to fix this and fix that, and they sent the camera to Steves 3 times, replacing multiple parts, and the camera finally worked properly, but they still didnt know exactly what the problem was, only that it worked. Needless to say, I decided not to buy that frankenstein machine.
That said, I reallly like RFF, and I bought an RD-1s recently from an ad on RFF, so Im not totally naysaying RFF!! It turned out the guy I bought from lived close enough so that we met in person and made an exchange. It was a great transaction, and I feel lucky.
In the end, sometimes we are conservative and still get a bum deal; or vice-versa, we take a chance with used camera gear and get a great product. But I would encourage you to hedge your bets and go with the odds.
Good luck, and dont let this stop from getting an RD-1. Its now one of my favorite cameras of all time.