newegg offers the G.SKILL 16GB microSDHC Class 10 Security Digital High-Capacity Card
, model no. FF-TSDG16GA-C10, for $8.99. Coupon code "BTEJJHB56" cuts it to $8.09
. With free shipping
, that's $0.51/GB and the least expensive 16GB Class 10 microSDHC card we've ever seen. (It's a current price low for one by $4.) It includes an SD adapter.