B&H Photo Video offers the SanDisk 256GB Ultra USB 3.0 Flash Drive, model no. SDCZ48-256G-A46, for $49.99 with free shipping. (Adorama has it for the same price, although it's currently backordered.) That's $5 under our mention from February and the lowest total price we could find by $15. It features read speeds of up to 80MB/s.