Greetings: I have an opportunity to purchase an R3 with a 50mm/2.0 Canada Safari, both pieces in green. The lens is in mint condition and the camera has wear at one of the strap lug areas(slight brassing ) and the back shows some wear where the thumb rests. In terms of function all checks out perfect. The offer price is $600USD. I have several screw models and an M3. Does this seem to be a fair price and is this considered a good acquisition by Leicaphiles. Need an answer/opinion asap. Thanks.