C.J.
I know you want a good deal, but I have purchased a cheaper mattress at babiesrus for our inlaws house. So are daughter did not use it very often maybe 30 times the whole year. Once she got to be over 20 pounds the mattress was no good. It just felt so soft. I took her one we had at home out there and bought her an organic crib mattress (love it!!). Then when she was started potty training I bought her a toddler crib mattress (more firm than a baby). Make sure you do your research and buy a quality mattress you don't want to have to buy another later. Plus if you get a good one you can use it for the next child :).