It is one of those items on ebay that fluctuates in price. In the large scheme of things they are never all that expensive. People like to get between 225 and 300 USD for them. I bought one off ebay a few years ago that I felt I got a good deal at 200 and it looked good and the lens was pristine and the meter worked. However when I got it the shutter wasn't working right. As it was good in every other way and the lens was perfect I sent it to Krikor and had it fixed and it works perfectly to this day... though I really never use it and treat it as a novelty. I see there are quite a lot of them for sale on ebay. If you are worried about 50 dollars one way or the other then wait for a low minimum bid with no reserve and hope it doesn't need a CLA.
Dennis