I was searching Movie Cards on graphicriver and one of the search result price was 300$ and in the item page it cost only 6$.
Of course it is error, so please take care of it envato team.
I’ve seen this a couple of times. If I’m not mistaken, price changes reflect immediately on the item page, but they can take a while to cache in the search results. So I’m assuming that the author did actually change the price to $300, just to ‘give it a try’, and then they changed it back.