Valley Vet has about the best prices. They have the Dr. Franks for about $140 with no shipping until mid-March. They are pretty good pullers, but I'd guess not as strong as the cable pullers.
I broke down and bought one last year after getting a $150 vet bill for pulling one and figured that after the next one I'd be even. My thinking is when the calf is backwards, you'd better be ready to get that calf out when you start, so I didn't like the idea of starting to hand pull a backwards calf when I didn't have a puller on hand.