Facebook feed, trade offers upload?

Question

Facebook

Hello guys.

The million dollar question, almost.
How to upload trade offers of goods to Facebook feed?
I did the unloading itself, but now it’s not clear how to add trade offers to the goods.
Also, from a new line, each separate trade offer, but then it will create a new product, because there is no connection between the main product and the trade offer ....

Now I have the following upload format:

<item>
    <g:id>12038</g:id>
    <g:title>название</g:title>
    <g:description>описание/g:description>
    <g:link>https://site.ru/produktyi/ukrasheniya/brastetyi/bez-kamnej/kolczo-molniya-black/</g:link>
    <g:image_link>https://site.ru/upload/iblock/dcf/dcfdad1f165ed49d1656d6a5d916ffd5.jpg</g:image_link>
    <g:brand>KV MODE</g:brand>
    <g:condition>new</g:condition>
    <g:availability>in stock</g:availability>
    <g:price>1500.00</g:price>
    </item>

Answer 1

Trade offers in FB are discounts. If you mean them, then you can simply add the sale_price field