Paying taxes/duty on used goods purchased in Canada

How about the actual fee schedule (assumed current):

https://www.ups.com/content/us/en/shipping/cost/zones/customs/fees.html

If it's like importing into Canada, you will have to pay the brokerage plus a disbursement fee and a COD fee.

Duties - I don't know, but would assume at least 6%.  Taxes - depends on were you live.

Just assume the worst, and if the deal still makes sense, go for it.

Riffer makes a good point about preparing for the worst because it is like a roller coaster, once you go over the top, you are no longer in control.  Best case is probably that you pay brokerage only, which I get charged for even small purchases from Partsconnexion, unless they are shipped by postal service. Some years ago, I believe it was around a hundred bucks or so for a SF preamp.  The NAFTA comments are valid but I would add, from experience, they are picky about the documentation being on a specific form and executed by the manufacturer, otherwise it may do you no good that they were manufactured in Canada.  One scenairo I have no experience with is shipping by a commercial carrier (I.e., a trucking company), although I would expect similar issues.

Looks like under $50 based on the link provided by Riffer. No duties, just this brokerage fee it looks like.

The seller/shipper will most likely pay at UPS....? Right?

IME, you will probably get a bill for brokerage about a week or so after delivery,. I have never seen the seller pay for this.