Here's the thing, the bot strategy is win the bid, no matter the price, so they set a high value to be the sure winner.
Then a real person will decide to pay or not when bid is over, no one will pay such values for a thing they can buy local with way less. If the deal is good the buyer will do the payment, otherwise jump to next and forget.
The objective is gather many good deals as possible, like less viewed listenings due errors or grammar