You may have received an answer in the CL subforum already but those are authentic. That style hasn't been faked and a lot of older styles have an orangier color to the soles. I'm actually wearing a pair of older style pumps right now and the color is very similar to what is pictured on your auction. I wouldn't worry.
Hello,
I just received the shoes shown below. The seller assures me they are 100% authentic, but the soles of the shoes are not the same color as my known authentic Loubies. Do you know if Louboutin ever used a different color/finish on slides? The color on these soles is more of a flat orangey color, not the lipstick red shiny soles on my Louboutin heels.
NWOB CHRISTIAN LOUBOUTIN PINK SNAKE SKIN SHOES 37 6 B (250335710124)