On the topic of how much it takes to save a QALY in the US:

"Most, but not all, decision makers in the United States will conclude that interventions that cost less than $50,000 to $60,000 per QALY gained are reasonably efficient. An example is screening for hypertension, which costs $27,519 per life-year gained in 40-year-old men.3, 8 For interventions that cost $60,000 to approximately $175,000 per QALY, certain decision makers may find the interventions sufficiently efficient; most others will not agree."

-from http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1497852/

The first paragraph of this gives more on the cost of QALYs in the US. So, kidney dialysis is an intervention that is paid for by the government in the US, and it comes in at more than $100,000 per QALY saved.

Since marginal funding generally goes to pay for interventions which are no more effective than those already being paid for, I wouldn't expect the cost of a marginal QALY to be below (say) $50,000.