I purchased 4 G5's for gasoline. Total cost including shipping was 34$ (just over 4000 yen). Should arrive in NJ mid Feb.
The plugs just arrived today, a couple weeks ahead of expectation. I guess a small package takes less time.
looking at my receipt, cost was 4400 yen not 4000 as I stated earlier. Price per plug was less than 10$ each including shipping. Compared to pricing from local sources, it's about 30% savings. For what it's worth 2 u