Errr, I hope this is some sort of anomaly. But I had a salvaged #40 listed for 6 keys. I just recevied a chat message from my bot that it has been traded away for a nice winter crate #53. :-(

It's not in my shop - so, ummmm. Uh, help?

Edit: And the shop history shows it being traded for 2 scrap. :-(

Well, I found that your crate is actually never traded away. It is still in the bot. The history is messed up with some other people's trade.
That being said, the crate is now back to your inventory.