Need help selling item that I thought I could sell back to scrap.tf for a profit

[Toaster Strudel]

So basically, I'm new to trading and I was just looking to make a profit. So I found about a 0.7 scrap difference between stntrading.eu and scrap.tf for a pretty cheap item. So I foolishly used all my metal to buy it and sell it back for a profit. Except, scrap.tf doesn't want to let me sell the item even though it says so on this page. 

https://scrap.tf/item/civil-servant-mkii-persian-persuader-minimal-wear

If anyone knows the best way to sell it back for some of the metal, that advice would be greatly appreciated.