I bought my Canonet after I did the research and ebay/KEH price check. I went into a little camera repair shop (icamera) around the corner from where I work in Downtown Oakland, asked if he had a Canon GIII. He had five, he showed me his best two. The camera I bought was EX++, with the seals re-done (in-house), a working battery, case/strap, and a 100-day warranty. I did not pay low-ball ebay or hi-ball KEH, but something quite reasonable, with no S/H, buyer/seller hassles.
icamera also had a few Retinas but I didn't want to mess with the lens cover apparatus while negotiating a bicycle.
Anyway YMMV, happy GAS!