I've once had the displeasure of having to interact Turkish customs because I got a merch kit from Intel, since it was under 30 Euros (nowadays simplified customs declaration isn't even a thing you have to go the same way as a commercial importer does,which you appear to have gone through, bribery seems to be expected) I didn't deal with Turkish customs directly but the fact that that I had to pay 60% of its value still annoys me to this day. I've also had to decline a second merch kit later because they removed the entire simplified customs declaration thing. I'm also currently trying to obtain SDR which it's market seems to be practically nuked, because of this customs shenanigans