There's three guys at the port. Biers, Port terminal(International Salt) and the port authority.
Biers is more expensive with tax you'll pay atleast 100 a yard picked up. They load nice with a skidsteer and wont spill out of your v box and deliver in one ton dumps. Geared more towards home ownwers they do a lot with mulch colored stone etc..
We buy from Port Terminal. Around 60 a ton picked up, I don't know what it would be fore delivery. Over 10 tons gets a discount.
The other place is Capital district salt..The telephone (518) 432-1184 or (518) 993-3480 I've never bought there though, seems like everytime I drive by they're closed.
If you're going for treated go see john parker, he's very similar to what your cost would be to buy the salt here pick up the magic there and spray it yourself. They deliver but I'd imagine it would be a big charge to come up here.
I was quoted 35 a tone from a national company out of snow business but they don't operate in NY (thanks a lot)!!
There are couple bulk suppliers in Schenectady but I don't know any of them. They're closer to you...check the Yellow pages, International salt may have a location in Schenectady.