Someone said :
Both. Travel forums and friends experiences with customs. Apparently with Macedonia, you have to declare anything of value above €350 and you can be fined for not doing so. In fact it's so bad in Macedonia it was an election issue.
I crossed borders 9 or 10 times in the Balkans, didn't experience any problems
Tourism is important to many of the countries in the region, I don't see why they'd permit the carry on you've read about
FYR Macedonia is an odd place in its own way, are you planning on traveling with goods over 350euro
Sofia is a fine place to check out,nice people, nice place, interesting, 90 euro return is incredible