B&H Photo-Video offers the SanDisk Extreme HD Video 32GB SDHC Class 10 Secure Digital High-Capacity Card, model no. SDSDRX3-032G-A21, for $43.95 with free shipping ($1.37/GB). That’s the lowest total price we could find by $1. It features 45MB/sec sequential read and write speeds.
Of note, it has a ship date of April 15.