Are you saying along with the one you just purchased that you want another? If yes, then I can send you an invoice through paypal for you to pay. It will only be $250, because of the 7 that I owe you as well as the combined shipping.
今お買い上げになったものに加えてもう一つご購入なさりたいということでしょうか? その場合は、paypal経由で請求書をお送りできます。「7」の借りがあるのと、また、まとめて発送しますので250ドルとなります。