Home depot: http://www.homedepot.com/h_d1/N-5yc1v/R-202871965/h_d2/ProductD
has a flashlight/lantern 3-1 deal that is marked $14.99 but is $5 in cart.
The also have an emegency sensor light: http://www.homedepot.com/h_d1/N-5yc1v/R-202868351/h_d2/ProductD
that turns on automatically when your power goes out that is $9.88 ont he
site but $5 in the cart.
If you need some party favors or have another reason to need cheaper LED
flashlights there is also an 8 pack: http://www.homedepot.com/h_d1/N-5yc1v/R-202871963/h_d2/ProductD
for $8 in cart. If you need a good flashlight these wouldn't be my first
pick but they would be great to give a bunch of kids to play with in the
dark for a sleepover and it comes with 24 AAA batteries!
Both are eligible for free in store pickup if you have stock at a local
store.
There are other Home Depot deals ont he forums right now as well so you may
want to combine multiple deals.