I work for a Magic distributor in Orange County, NY. Our pricing to contractors is $11.25 per 50 lb bag picked up. If someone were to take a full pallet I imagine there could be a little room for discount.
Joker, I think you will be happy with Magic. We aren't just selling it, we use it ourselves. (Sounds like a hair club commercial huh?) Last year we dabbled with it and went so far as to buy a small 200 gal spray rig. After seeing the results we purchased a 500 gal spray rig and my boss became a distributor.
How much salt are you thinking of treating and where is your closest distributor? The "standard" size pile around here is about 25 tons....tri-axle dump load usually. We treat those piles for about $26 a ton. :cash I know....sounds expensive, but we found our salt was going twice as far with far better results. That's our own results, not a sales pitch. It can really save you money if you use it correctly. So I don't bore anyone here, if you want more info drop me a PM or email and I'll tell you what I can.