[Translation from English to Japanese ] As for the price for 4 units, we would only be able to offer them to you at $...

As for the price for 4 units, we would only be able to offer them to you at $75 ea. (including shipping to OR.) for that quantity. We have had to raise our regular price on Ebay to over $90 now because of the high costs. We could offer you the price of $72.00 each (including shipping to OR.) for a quantity of 10 units if you like.

商品４個では、どうしても価格は各$75までしか提示できません。（オレゴン州までの配送料込み）現在コスト高のため、Ebayでも通常価格を$90に上げざるを得ませんでした。
もし、10個お買い求めいただけるのであれば、各$72（オレゴン州までの配送料込み）で提供いたします。