Keil's markets (Clairmont & San Carlos) has Cabo Wabo on sale for Cinco de Mayo. $19.99 for silver/blanco and $15.99 for the reposado. This is $27+ off the regular list price. You need a Keil's card but you can sign up for one at the register and get the discount.
If you're planning on making a pitcher of Margaritas the Cabo Wabo silver makes a very respectable drink. As a shot no, but in a drink yes.
Also, anyone going to the Wine Vault's Cinco de Mayo dinner? The menu looks very good and their wine and beer pairings are very intersting. It has the makings for a great dinner. The 5th was sold out by the time I called for th res. but they still had space on the 4th.