Hi,
The method proposed by Xavier won't work.
Sourcerer doesn't have knowledge of the variables of the product page.
That's why $this doesn't exist for sourcerer.
But yes, doing it like I explained can't be done automatically for all the products at once via the interface. That's however the simplest.
Doing it with sourcerer, you'll have to add more complex code in it. And actually, it's really complex as it involves a lot of code to do that (getting the current product id, loading the product data, loading the prices, loading the price display interface with the product price) and it will even require to modify the code of HikaShop directly. So it's not a viable solution.
I would still recommend to use my proposition.
To add all the tags in your products description in one go, you will require to run a mysql query in your phpmyadmin:
UPDATE #__hikashop_product SET product_description = concat(product_description,'{product}', product_id,'|quantityfield|pricedis3|pricetax1{/product}');
where #__ is your table prefix.