The Bessa's have intreged me. How plentiful are the 39mm screwmount lenses? Are they expensive and are the lenses available as good as or better than 70's and 80's vintage Nikkors?

I have gotten rid of most of my 35mm gear as I very rarely use it anymore. To me a compact camera is the blad. However there are times I wished I had something smaller. Currently what I use for 35mm is a Nikkormat FTN equipt with 28, 35, 135, 80 to 200, 43 to 86 and of course a 50mm. I realize I would not be able to get a zoom for the Bessa, but then again I very rarely use a zoom, except for the 43 to 86.