It is in product.tpl and in products_t.tpl. You may be using either one of them depending on your layout. It is just to the right of the different lables. For instance...
Code:
<font class=MarketPrice>{$lng.lbl_market_price}: <s>
{include file="currency.tpl" value=$products[product].list_price}
</s></font>
then, right below that....
Code:
font class=ProductPrice>{$lng.lbl_our_price}: {include file="currency.tpl" value=$products[product].price}</font>