Newegg offers the Patriot Stellar Boost XT 32GB OTG USB 3.0 Flash Drive, model no. PEF32GSTRXTOTG, for $19.99. This $7 mail-in rebate cuts it to $12.99. With free shipping, that's the lowest total price we could find by $7. It features a transfer rate of up to 110MB/s. Rebate expires December 31.