Amazon.com has ExcelSteel 217 3/4-Quart Stainless Steel Mixing Bowls for $1.
50 each.
They qualify for the 4-for-3 promotion. When you order 4 the total comes to
$4.50 (free shipping with Prime)
Link: http://www.amazon.com/ExcelSteel-217-4-Quart-Stainless-Mixing/d