I managed to get a box of extraordinary boards from a decommissioned 1976 nuclear launch control system. The components are so richly covered and filled with PMs, I'm holding back on processing them until I perfect all my methods, especially palladium recovery as these have large early-type MLCCs, with huge electrodes that appear to be pure palladium. I don't want to rush and ruin such incredible recovery potential!It is fairly normal that e-waste isn´t seen in obvious places. You need to build network of connections to make fair volume, and scrapyards and other easily looked channels will be no help for you - most of the times, they have deals with other well establish guys in the field. So they don´t leave anything for you. Unless you make better offer - which is in most cases to buy bulk - everything for a good price. What small scale beginner cannot do with limited budget.
Same where I live. Also Eastern Europe. You need to build name and trust in order to proceed to collectors who have decent quantities of material. Use internet marketplaces to advertise yourself etc. Be creative, fair and honest. It is uncommon in this field to find trustworthy, fair and honest refiner, who does the job in time and for fair revenue. People know this and the right ones stick to you.
Work smart, not hard - that is the rule which apply in this business.
I also do not find old soviet material by myself. But I found people who have access to such material in fair quantities and are willing to sell it to me. For fair price of course. No shorts, no low-balls, fair deals - they know what they are selling.
It start very slow from beginning, but as you go, you gain experience, in chemistry, apparatus build-up, negotiation, selling PMs etc.
For me, it took few years to cross the boarderline - that I do not spend time to search for the material, but other people came with it to let it refined or purchased by me. By the time, you are left with few trusty people that supply the material to you on semi-regular basis, and that is probably the best operating model for small refiner. Something bit more than hobby, but not your primary income.