fedex if you have a business account with them is the best, if you don't USPS (United States Postal Service) is usually cheapest, but UPS is usually close, fedex is pricey without a bussiness acount.
Hey jus to let you guys know UPS is known for throwing stuff around and breaking stuff more than the other carriers. so if you are worried about the skis getting beat up dont send them UPS.
usps is cheaper and faster than ups. haven't used fedex much. If the skis are already used so you dont care about scratches and dings you can just wrap them together pretty good with tape and slap a label on them. I did it with a single ski and it was like 6 bucks. obviously cant do that with bindings though.
USPS is by far the best... you can ship skis super cheap. Also, I have never had a package with USPS priority mail take longer than UPS or Fedex ground.
Most of the skis I have shipped were with bindings... I averaged around $20 with USPS and $30 with UPS.
UPSP does have size restrictions!!! Keep that in mind. I tried sending some mounted 180s in a decent size box and they couldn't do it. I had to go UPS.
I have shipped and received skis in Canada just by using the Greyhound bus lines...super cheap and gets to its destination super quick...easy too if the person you are sending them to is paying shipping...you just ship them collect and when the guy picks them up he pays the actual shipping charge so nobody gets screwed...