Walmart B&M has select SanDisk Ultra Plus 16GB SDHC cards on clearance for $3.00 each. This applies only to cards with the UPC 619659113025. I had to dig through their cards to find the last three at my local Walmart.
http://brickseek.com/walmart-inve…u=521983
https://www.walmart.com/ip/SanDis…r/52198324