Not sure if it's been mentioned here but the limits for cross-border shopping in the US will increase effective June 1. If you spend 24 to 48 hours, the personal exemption increases from $50 to $200. If you spend at least 48 hours, it jumps from $400 to $800 (!). The increase if you spend 7 days is only $50 (from $750 to $800).
Always nice to subisidize a portion of your trip by getting some good deals south of the border
