This deal has ended.
Update: this is now sold-out. Amazon now has 23 Corelle 16-Piece Dinnerware Sets on sale for only $17.99 each, despite their standard $51 pricing. Check out the Urban and Country Cottage styles. Each set comes with four dinner plates, four salad plates, four bowls, and four mugs. Shipping is free with $25 and there's no sales tax (except KS, KY, ND, NY, WA).