Amazon offers Prime members Grave of the Fireflies on Blu-ray
with free shipping
. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $4.98.) That's $3 under what you'd pay at a local retail store, although last spring we saw it for $2 less via in-store pickup.
: Note that this item is temporarily out of stock, but can still be purchased at this price for delivery when available.