Are postage stamps from Cuba and North Korea allowed to be listed?

[lamous13]

I am unclear as to postage stamps and coins being allowed for listing from Cuba and North Korea. I do see some listed but also see that these countries are on the "no fly" list. So before I get in dutch with eBay I would like clarification on their rule. I did check the Fed's site link which was clear as mud as to these two items. Any help out there?  Thanks.