Rakuten Shopping offers the Kingston DataTraveler MicroDuo 64GB USB 3.0 On-The-Go Flash Drive, model no. DTDUO3, for $23.99 with free shipping. (Amazon offers the same for Prime members, however it's currently backordered.) That's $5 under our mention from two weeks ago and the lowest total price we've seen. (Outside of the mention below, it's also a current low by $4.) It features up to 70MB/s read speeds and up to 15MB/s write speeds.

A close price: Newegg offers it for $23.99 plus 99 cents for shipping.

Update: The Rakuten item has increased in price; however, the Amazon item is still $23.99 with free shipping for Prime members.