Question:
May one purchase a sale item online during nine days if it will only be shipped after Tisha B'Av? The item in question is a vacuum.
Answer:
We are not allowed to buy things during the nine days, even if it will only be used after T'bav. However if the sale will not be available afterwards and it is a real bargain that doesn't happen too often then it would be permitted.
Sources:
O:CH 551-2, M:B 551-11.
