I think 12 hours is perfectly reasonable. I've been on both ends, and can see how sellers can't be sure a person is committed until the payment is sent.
I have bought two knives from guys here (one of which gave me untold customs and delivery hassle involving a 250 mile round trip to collect the thing)
I'm in North Dakota staying at my wife family for a week. Of course every knife they own is dead dull.
I went to the local sporting goods store
2 x 180mm nakiri,
1 x 240mm S grind gyuto,
1x 240mm asymmetric grind gyuto for a right-hand user