Those pictures are the natural color of Ipe prior to staining. This color fades to grey within a few months out in the sun and then it requires a stain. I haven't stained my deck yet, but have bought an oil that I hope will return it to this color.
Ipe is going for about $2.50/lf (1x6) I belive. Not sure what pine decking is going for, but I would guess my Ipe deck cost about double what an equivalent sized pine deck would cost. However, I installed some pine boards a few years prior to constructing new, and the pine warped, twisted, split very badly in a short time. That is not what I wanted around a pool area. The installation is labor intensive so installation prices may be high, but I provided all my own labor. As far as getting the lumber, I know that Austin Wholesale Decking Supply carries it. Not sure how far that is for you, but I have heard good thing about them.
Riles