Just to give the exact value, for gifts, you don't have to pay customs if it's $60 or less. For merchandise you don't have to pay customs if it's $20 or less. However, the only time that I've ever had to pay customs for getting something across the border is when I bought my Leopold from EK. I didn't have to pay customs when I bought a WASD keyboard nor for anything I bought through Ebay, such as my Poker and a variety of non-keyboard/mouse related things.