Today, we're launching a large improvement to the way you view item stats on Marketplace.tf. The Stats Update allows you to view the past 3 weeks of sales history for any item on Marketplace.tf!
To view an item's sales history, simply visit its page on Marketplace.tf. There, you'll see the past 3 weeks of sales history for that item. Note that this displays the last 21 days that an item had a sale, not the past 21 chronological days. This means that for lower-volume items that don't sell every day, you'll still see up to 21 days of data.
Enjoy! Be sure to let us know what you think in our subreddit.