Thanks for the input Francois and Peter.
I contacted Mark Hama, and the estimate for a CLA and repair of the stuck advance lever ( which has unstcuk after I fiddled with it for awhile) is $110 plus $14 for shipping and insurance.
I also contacted the Yashica Guy but have heard nothing so far- thanks Peter for the input.
Not sure what I will do at this point, since the camera seems to be functional again.
Even with the critters on the lens, I love this camera. It's always been one of my favorite RF's as the optics are tack sharp and it has the perfect heft in my hands.
Thanks again!