For in-store pickup only and with stock varying by ZIP code, Walmart offers the Samsung 64GB EVO UHS-I Class 10 microSDXC Card with Adapter, model no. MB-MP64DAT/WMT, for $24.49. That's tied with our expired mention from five days ago as the best price we've seen for this model. (It's a current low by $1.)
A close price: Adorama charges $24.95 with free shipping.