Eastern European Denarius Finds

Some of the Eastern European countries are notorious for selling fake ancients, so it's best to be cautious when buying there.

echizento is right.
I am always suspicious about buying Roman coins from individuals in Eastern and Southeastern Europe, unless they are from an internationally recognised dealer, and they are far and few between in that part of the World. Lots of good quality fakes come from this region.

If I was a detectotist from this region I would have to illegally send my genuine finds out of the country for sale, because in most countries of the region, you cannot legally do so.
There also laws in the U.S. which prevent the importation of genuine ancient coins. They are supposed to be complementry to the laws of the 'find' countries.

That is why there has been increase in the number of fake denariii; you can quite legally export those!

Trade in ancient times was far reaching and knew few if any borders. Many ancient Egyptian (second millenia BC) lapis lazuli objects have been proven by analysis to have been carved from stone originating from Afghanistan. Likewise we know that amber originating from the Baltic region (Poland Lithuania etc) was highly prized by the Roman upper classes. Some sources claim it was worth its weight in gold. While it is doubtful any Roman would be crazy enough to venture that far into 'Germania' to trade in things like amber, surely some enterprising (and large !) Nordic types probably traded in amber and elegant fur trade with peoples along the Rhine who would gladly exchange silver denarii for precious items.

Then turn them around to the Romans for gold !