Last minute very high bid on eBay or other online auction house meant to blow the competition out of the water. A blast bidder really wants the item and is smart enough not to tip shem's hand to early. For a seller colliding blast bids provides a tidy profit.

Example: I blast bid $30 on the Gene Ammons LP even though I knew it wouldn't get higher than $20 because it rounds out my collection of Jug's vinyl.

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