Best Buy via eBay offers the Sandisk 128GB Ultra plus Class 10 microSDXC Memory Card, model no. SDSQUSC-128G-ANCMA, for $69.99 with free shipping. That's $110 off list and the lowest total price we could find. includes an SDHC/SDXC adapter and features read speeds of up to 80MB/s.
Update: Specs corrected.