I've ordered a lot of R/C stuff over the years so I've learned the hard way.
If you have it shipped by USP no extra charges, possibly may have to pay GST and that should be it.
Coming out of China is usually via postal system so again no charges, may have to pay GST depending on what the customs form says (not usually).
And the BAD, using a courier service especially UPS will result in brokerage charges, GST for sure and maybe some others charges just because. And to boot you may not know that until after you get your parcel and then get a nice big bill in the mail !!! Sleazy IMO
Oh and I found that if you use a couriers air mail option which is not much more expensive, then it covers the brokerage fees etc. so there will be no extra charges.