Newegg offers the Patriot 64GB LX Series UHS-I Class 10 Secure Digital Extended-Capacity SDXC Card, model no. PSF64GSDXC10, for $23. This $5 mail-in rebate drops it to $18. With 99 cents for shipping, that's $0.30/GB, $5 under our mention from four days ago, and the lowest total price we've seen. (It's also a current price low by $25.) It features read speeds up to 50MB/sec. Rebate expires January 31.