iTech Deals offers Samsonite Vacuum Clothing Storage Bag 5-Pack for $14.98. Coupon code "SAMSONITE3" cuts it to $11.98. With free shipping, that's tied with last month's mention as the lowest total price we've seen. (It's also the lowest price could find for a similar 5-piece set elsewhere by $5.) They're airtight, waterproof, and accommodate any vacuum hose.