

Since we are talking about ccTLDs:
.dk domains => you are not allowed to buy them for resale afaik
.jp domains => I'm not aware of any such restrictions but it doesn't matter since they don't seem to sell so often
ccTLDs are specialized markets, they are all different and make sure you are familiar with the rules.
What works in .com doesn't automatically work well in another extension, especially in foreign languages.

