Most sellers treat Amazon's auction like eBay. Highest bid wins, you pay what yo
By Anthony Nguyen 🟢 · July 12, 2026 · Curated by George's Blog
Most sellers treat Amazon's auction like eBay. Highest bid wins, you pay what you bid. Wrong on both counts.
Amazon runs a second-price auction. You pay one cent more than the next highest bidder, not your actual bid. If you bid $2.50 and the next competitor bids $1.80, you pay $1.81. Your max bid is a ceiling, not the price.
This means two things. First, overbidding costs less than you think. If you bid $3.00 and everyone else is at $1.50, you still pay ~$1.51. You don't burn $3.00 per click. Second, underbidding costs more than you think. Drop your bid from $2.50 to $2.00, and if the next bidder is at $1.80, you still pay $1.81. You saved nothing. Drop to $1.70, and you lose the placement entirely.
But bid amount isn't everything. Amazon factors in expected CTR and relevance. A $1.50 bid with a 2% expected CTR can beat a $2.00 bid with a 0.8% expected CTR. Amazon wants clicks, not just high bids, because they make money when people click.
This is Amazon's version of a quality score. They don't publish it. But it's real. Your listing's historical CTR on a keyword directly affects your ad rank.
Practical implication: a listing with a great main image and strong relevance to the search term will win auctions at lower bids. A listing with a mediocre image needs to outbid everyone.
You're not just bidding dollars. You're bidding dollars multiplied by your listing's clickability.
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