another name (esp Scot, US, and Canadian) for reserve price
upset price in American English
the price fixed as the minimum at which something will be sold at an auction
upset price in American English
noun
the lowest price at which a person is permitted to bid for something being sold at auction
Word origin
[1805–15]This word is first recorded in the period 1805–15. Other words that entered Englishat around the same time include: alpaca, backlash, makeup, one-sided, phase