Curious about foreign rights

From my understanding it's pretty random. I know of one author that was picked up for foreign translation before the American rights sold, and plenty who have managed good advances in North America but failed to sell to any foreign markets.

Unless it's a blockbuster there's no way of telling if it will sell at all. It could do better overseas, it could do worse, it might not sell at all, or it could be huge in Hungary for some bizarre reason you'll never figure out.

That's not to say that it's random, just that the factors which determine sales are different in every market.

yes, as above. you can make more, you can make less. always worth asking a prospective agent what their foreign mkt experience is - can make a big difference. I