I haven't phoned them for a price, yet.
The reason I went looking for this in the first place is because the only place I can get dry ice in town isn't open on the weekends and they don't produce it here. They get it shipped in and store it. The stuff I used, so far, seemed kinda low grade or degraded from storage. I picked it up on a Friday afternoon, benched after work, and by 5:00 am, it was all gone.
Needless to say, I had serious withdrawl symptoms the rest of the weekend.