I realize the original person who posted is from CA but if another Canadian happens to read this thread you might be interested in knowing that the generous state of ND will refund the state tax paid on pretty much anything you purchase for use back in Canada as long as it's not consumed while visiting ND. This even applies to vehicles!
I've already received several hundred back, it's great!
When I did some digging, I couldn't find other states offering similar incentives. So if you're a Canadian looking to do some cross border shopping, ND will give you a nice incentive to support their economy
Complete details are availble if you follow this link