OP wants to ship to Switzerland, a bus will need one hell of a running start.....
My company ships to Switzerland, but I assure you our trucks don't go there. Canada Post doesn't go to Switzerland either, nor does other parcel carriers like CanPar, Purolator, etc...but they can still get a shipment there.
Interline agreements make that happen.
I agree it's unlikely Greyhound could do that sort of thing, but like I said, it's an easy call, and I was just tossing that out moreso for others perhaps vs our our OP.
As for the OP, well...honestly, you are not going to find any method of shipping something that large overseas that isn't likely going to exceed their value. If the buyer wants them bad enough and is willing to pay whatever the cost might be, then I wouldn't go crazy driving hours away to ship them or anything - find the most reasonable option locally, send them the price, and then see if they want to pay it. If not, well, they don't want them that bad I guess.
One thing to keep in mind is that for a shipment that far away you really should crate them. Packing them in cardboard is almost certainly a recipe for them not arriving intact/undamaged. I have been in the freight industry for decades, and trust me, you have no idea how many times your shipment will be handled between A and B, and HOW it will be handled along the way. Just dropping them in a cardboard box with some newspaper around them for protection is unlikely to end well.
When you get into crated shipments, or shipments beyond a certain size, you are generally in freight vs parcel territory, so you may want to call some freight forwarders and go from there. You will need the dimensions of the shipment and the weight before they will quote you anything - dimensions are the most important part because large items that don't weigh much are shipped by cubic weight, not actual weight.
