The offer price of a product, or of a price component when attached to PriceSpecification and its subtypes.
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Usage guidelines:
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<ul>
<li>Use the <a href="/priceCurrency">priceCurrency</a> property (with <a href="http://en.wikipedia.org/wiki/ISO_4217#Active_codes">ISO 4217 codes</a> e.g. "USD") instead of
including <a href="http://en.wikipedia.org/wiki/Dollar_sign#Currencies_that_use_the_dollar_or_peso_sign">ambiguous symbols</a> such as '$' in the value.
</li>
<li>
Use '.' (Unicode 'FULL STOP' (U+002E)) rather than ',' to indicate a decimal point. Avoid using these symbols as a readability separator.
</li>
<li>
Note that both <a href="http://www.w3.org/TR/xhtml-rdfa-primer/#using-the-content-attribute">RDFa</a> and Microdata syntax allow the use of a "content=" attribute for publishing simple machine-readable values
alongside more human-friendly formatting.
</li>
<li>
Use values from 0123456789 (Unicode 'DIGIT ZERO' (U+0030) to 'DIGIT NINE' (U+0039)) rather than superficially similiar Unicode symbols.
</li>
</ul>