Everyone talking about shipping, also keep in mind when quoting, you may get hit with fuel surchages above and beyond your quoted price.
Also, make sure you give proper dimensions. Regular standard size skids are 40*48. If you are not using something smaller but quote less, they can hit you back with a reconfigured cost adjustment. When this is done they will charge you actual cube weight, as well as the labor for someone to measure. It doesn't happen often, but when it does you don't want to be in the billing end.