I got a Dyna with the cradle/snare wire frame.no snares on it.This was before pure sound came out with the retro fit dyna snarewires.
I tried the rhythm tech wires that are encased in a box/frame,but I hated them,unless you like your snares really loose,otherwise you have to tighten the throw so much that you totally choke the drum.
I then used some regular wires,the dyna does have a snare bed,but an extremely shallow one,and the regular wires worked ok,but not as well as when I got the pure sounds on it.When I did that when it was tuned right rimshots would take your head off.
Here in the states a 1977 5" dyna sells for around 275.00 complete,and that is what I sold my 1976 for a couple of years ago.
U.s price for Snare frame,50-75 U.S. ,the bottom hoop complete 75 plus,and puresound wires are 45.00 50.00 I think,Strainer/throw I have no Idea.As is I would not give more than 75.00 for that dyna,if that.
I don't know what Sling 70's 3 plies are going for in Serbia,but still the three ply 70's sling drums would still go for 600.00 here in U.S. IMO.Still a good deal U.S. currency wise I think.You may explain to the seller that to get the dyna up and running close to 250.00 easily.430.00 is still a deal I think,but you could always ask the seller to take a few bucks off and keep the dyna.