For in-store pickup only, Sears offers the PNY 16GB Class 4 microSDHC Card, model no. P-SDU16G4-GE, for $9.99. Plus, Shop Your Way Rewards members bag a $5 Shop Your Way Rewards credit. Assuming you'll use the credit, that's the lowest total price we could find by $4, although we saw it with a $10 credit in September. It comes with an adapter.
Of note, Shop Your Way Rewards members may be eligible for additional credits and discounts.