When there are three lovely vintage patterns up at the same time in the right sizes for low starting bids and you want them all. When you win two of them at the starting price and the third with an extra few pennies after someone kindly saved you the decision of whether or not to go for the Buy It Now. When one of them turns up, in the wrong size, and the seller says sorry, send it back and I’ll refund you the postage and send you the right one. And she does, right away. When the other two arrive, perfectly complete with neat pins, folds and tailors’ tacks from the last time they were made, decades ago. It’s been that kind of week.