Either way, trading and buying/selling internationally has even more risks, such as getting lost in the mail and additional inconveniences. Getting lost in the mail is just a risk of shipping. The additional inconveniences aren’t that bad, another form to fill out, waiting in line, extra postage, doing stuff at the counter, it’s not that big of a deal.
Plus, not to hit home but I’ve found dealing with the Czech Republic from a postal/shipping point of view to be a major pain in the butt. It’s like I gotta pay a major fine to deal with shipping to or from. However, do keep in mind in my case, I was dealing with getting an electronics panel that only weight 2kilos from a company there to go in my Czech made speakers(KV2 Audio, AWESOME stuff. I love this gear!) to replace a failed one. Shipping to get it to me in a month: $650. Comparison: Overnighted the same board via UPS next day since their new US distributor finally got some: $70.
Even so, this one reeks of scam and being ripped off. Sorry to hear about it.