I have old El Tesoros and another good one is the Chinacos before German left to be master tequilero of T1. Anything bottled before 2009 is a treasure. Chinaco was the best $45 tequila around back then. It's still good, but when German was doing it, it was close to the very top.
I really enjoy El Tesoro but have never seen the older bottles. Can you post a picture of one so that I know what I'm looking for? We have a huge Mexican community here in Chicago and I'm thinking I might be able to find some cool stuff in Mexican neighborhoods nearby.
"I distrust a man who says 'when.' He's got to be careful not to drink too much, because he's not to be trusted when he does." Sydney Greenstreet