A price which differs from value in quality is an absurd contradiction.
 Karl Marx, Das Kapital (1894). copy citation

Context

“Price, after all, is the value of a commodity (this is also true of the market-price, whose difference from value is not one of quality, but only one of quantity, referring only to the magnitude of value) as distinct from its use-value. A price which differs from value in quality is an absurd contradiction. [7]
Capital manifests itself as capital through self-expansion. The degree of its self-expansion expresses the quantitative degree in which it realises itself as capital. The surplus-value or profit produced by it — its rate or magnitude — is measurable only by comparison with the value of the advanced capital.” source