A secret reserve price allows bidders to see each others' gradually ascending bids and thus draw confidence that they are not alone in prizing the item.

保留价格保密可以让出价方看到彼此逐渐攀升的出价，从而激起他们的信心，让他们相信自己不是唯一欣赏这件物品的人。

youdao

So last month Swoopo began letting failed bidders purchase the item they wanted at a discount equivalent to the amount they spent bidding.

因此上个月，Swoopo开始让流标者打折购买其想要的物品，折扣价相当于其在竞标上花的钱。

youdao

This is much like the old model of telephone bidders, with the difference that the remote participants can see the room, examine each item and lurk, rather than bid.

ECONOMIST: The new old thing

It's tough advice because it involves red tape, but it might save your donors and bidders a lot of trouble later: As you gather donations, assign fair values to every item.

FORBES: Taxing Matters: Going, going, deducted!