That sounds like a lot to me too. I do think you get what you pay for, but little bodies have very little weight to them and so (as I was told) don't need anything like the support that big people need so you can get away with cheaper mattresses without compromising IYKWIM. I think the girls' mattresses were about $250 for the single beds they have at my Mum's house. Probably doesn't help for me to tell you where I bought them - unless you feel like a lovely looooooooooong drive to pick them up ;-)