I have bought formula on e-bay. My son was on nutramagen and we had some good savings with buying on e-bay. I'm pregnant with our second and whatever this child will be on, i'll probably try to purchase it again on e-bay as well.
Just on another note....I totally understand the high cost of formula can be a real strain on your budget. what I did was I called my doctors office, told them the situation...that my son was on nutramagen and he needs this formula but we cant afford it and I dont know what to do. I didn't think they could do much but they sent me a whole case of it for free. It was a one time thing, but gosh it helped!
maybe you could try that, the worst they'd say is no.
good luck
nancy