Before I even start, I suggest you read polar's guide on unusual suggestions here: http://forums.backpack.tf/index.php?/topic/6033-guide-for-unusual-price-suggestions/
this contains all the basics and info you need to know.
What is compare?
The compare function allows you to compare an inventory between day x and day y, the problem with this is that your inventory is only saved once a day, so if you get a hat and trade it away instantly it will NOT show up. Luckily there are alwa