How to use price range inside "Offer" type?

Question

I have category pages that contain products. Some of the products have fixed prices and some of the products have price ranges.

Also any product has a seller that must be inside Offer. Right? So I must use the Offer type and I can not using PriceSpecification. Am I wrong?

How can I use Microdata with this condition?

A product with price range in my product list page:

<li  itemscope itemtype="http://schema.org/Product"   >
<span  itemprop="name" >ProductName</span>

<div   itemprop="offers" itemscope itemtype="http://schema.org/Offer">

<ul>
 <li><meta itemprop="maxprice" content="1000000"  /><meta itemprop="minprice" content="10000"  />
<meta itemprop="priceCurrency" content="USD"  />
from 10,000 to 1,000,000 USD</li>

</ul>

<div  itemprop="seller" itemscope itemtype="http://schema.org/Organization">
<ul>

<li><span itemprop="telephone" >00188341534</span></li>
</ul>
</div>

 <div  itemprop="address" itemscope itemtype="http://schema.org/PostalAddress">
<span  itemprop="addressLocality">Washington</span></div>

I need valid code look like this. But this code is not valid.

Answer 1

You can have a PriceSpecification for the Offer, by using the priceSpecification property:

<article itemscope itemtype="http://schema.org/Product">

  <div itemprop="offers" itemscope itemtype="http://schema.org/Offer">

    <div itemprop="priceSpecification" itemscope itemtype="http://schema.org/PriceSpecification">
    </div>

  </div>

</article>

And inside the PriceSpecification, you can use the minPrice and maxPrice properties. (Note that they are case-sensitive.)

Answer 2

<div itemscope itemtype="http://schema.org/Product">

  <div itemprop="offers" itemscope itemtype="http://schema.org/Offer">

  <h1 itemprop="description">New furnace and installation</h1>

    <div itemprop="priceSpecification" itemscope itemtype="http://schema.org/PriceSpecification">
    Prices for a unit installation:<br>

    Minimum : <span itemprop="minPrice">10.00</span><span itemprop="priceCurrency">USD</span>
    <br>
    Maximum : <span itemprop="maxPrice">30.00</span><span itemprop="priceCurrency">USD</span>

    </div>

  </div>

</div>