Shoebacca via eBay offers the PUMA Women's Basket Platform Strap Velvet Rope Sneakers in PUMA Black/Icelandic Blue for $44.96 with free shipping. (Fanletic via Amazon charges a few cents more.) Excluding the below mention, that's the lowest price we could find by $15. They're available in most sizes from 5.5 to 11.

Note: Shoebacca via Amazon offers size 7 and size 10 for $40.60 with free shipping.

Update: Sizes 7 and 10 are now $41.72 $40.60 from both Shoebacca via eBay, and via Amazon.