Canada post sucks! period.
Fedex and ups can ship but it's expensive.
If they can drive across the border, that's the best way. It's up to them if they want to declare the amps at customs. If they are smart, they will declare them. They will need a bill of sale from you to avoid paying customs on the full retail price. They could get away with a reasonably low sale price and pay the customs on that. If they go too low, customs will know (they'll google it).
The buyer should be honest that shipping was too expensive and the amps weren't worth that much.
Just keep in mind that Canadian customs are greedy...
Fedex and ups can ship but it's expensive.
If they can drive across the border, that's the best way. It's up to them if they want to declare the amps at customs. If they are smart, they will declare them. They will need a bill of sale from you to avoid paying customs on the full retail price. They could get away with a reasonably low sale price and pay the customs on that. If they go too low, customs will know (they'll google it).
The buyer should be honest that shipping was too expensive and the amps weren't worth that much.
Just keep in mind that Canadian customs are greedy...