The one I brought up on AA.com last night under search by price using some random dates. I input Feb 6-13 EWR-FRA and it returns a $350 base fare EWR-DFW-FRA. It's still there this morning (just checked, and it will let me purchase it). With taxes it's $458.30. It's an N fare. I frequently see fares on AA.com that may not show up on other sites. This could very well be one of them.