I've got ring slings, wraps, pouches and a mei tai, and I've made them all myself. I'm not real fond of the wraps, but just because they take too long for me to tie comfortably. i love the mei tai, and my fleece pouch because although she's heavy, it has a bit of give to it so it's more comfortable.
Price, since I make my own, range from about 10 for my no-sew wrap, to probably 30 for the mei tai. I also use leftovers for other projects and from other projects so that saves me money. My DD at the moment has a jacket and hat that match one of our fleece pouches.