discuss Domains you can't sell

[wot]

There are a few registries that say in their terms and conditions that you cannot buy to sell their domain names.
Which ones do you know? Here is a start-

.swiss
.eus
.corsica
.sg

I am sure there are a few more to add to the list?

 

[DomainNature]

I have read that .ro and .ru have such rules.
I would be interested to know more about this, because I hold some in this extensions and not want to run into troubles.
.ro
.ru
Some input from experienced domainers regarding this matter is highly appreciated!