I don't know about that: Excerpt from the IRS website:
It is a common misconception that if a taxpayer does not receive a Form 1099-MISC or if the income is under $600 per payer, the income is not taxable. There is no minimum amount that a taxpayer may exclude from gross income.
Prizes and awards
Subject to certain exceptions, the cash value of prizes or awards won in a drawing, quiz show program, beauty contest, or other event, must be included on the tax return as taxable income.
Taxpayers must also report the fair market value of merchandise or products won as a prize or award, as taxable income.
For example, both a $500 cash prize and the fair market value of a new range won in a baking contest must be reported as other income on Form 1040, Line 21.