reading your post, you just want to go into this kind of picture taking, but have no preferences?
I personally do not see the need to spend € 1.3k on a new old lens.
You did not write which cam you use, so if it is not a Nikon, but any mirrorless,
buy an adapter and an original 50mm trioplan, together € 100.- (and already overpaid),
as these lenses 2 years ago where at € 25.-
Otherwise you could buy a new 1.5 85mm Russian Helios, which fits to you Nikon for a
very reasonable price and use it as well as portrait lens.
Btw, the proposal made by Jakov works on both Nikon DC lenses and both are much more
valuable than this 50mm Trioplan.