Focus Camera offers the Sony 32GB UHS-I Class 10 microSDHC Card 4-Pack, model no. SR32UYA/TQMN, for $39.99 with free shipping. That's $10 per card, the lowest total price we could find for this quantity by $20, and the best per-unit price we've seen. (For further comparison, we saw a single memory card for $13 shipped in May.) It features read speeds of up to 40MB/s and write speeds of up to 10MB/s.