I usually buy Tlilxochinin (or something like that). It is coumadin free and comes in small bottles that start around $3. Buy one, open it up and see what you think. Then go back and buy more cause you're gonna' wish you had if you don't!
Also check out the pewter at La Pinata. Fabulous serving trays for $30-$50.
Also - the vanilla is a small, easy to carry souvenier to take home to friends. Forget the tequilla - buy vanilla!