BuyDig via eBay offers the SanDisk 200GB Ultra UHS-I Class 10 microSDXC Memory Card, model no. SDSDQUAN-200G-G4A, for $78.95 with free shipping. Outside of the mention below, that's the lowest total price we could find by $2, although we saw it for $19 less two weeks ago. It includes an adapter.
A close price: Newegg has it for $79.99 with free shipping.