as a canadian, there are many things you can do to make sure transactions go easier.
1. package securely: customs is much more apt to open something that rattles.
2. mark package using technical language. (pneumatic equipment, pneumatic feed equipment [evoIIhopper
3. use USPS. period. even if you are getting a $1 pen from the US, UPS automatically charges a $30 brokerage fee, whereas USPS is far more reasonable around $10