Screenshot your trade history. Beats having no proof.

Although that said, this compare link supports what you're saying;

http://backpack.tf/profiles/76561198003841680?time=1439535600&compare=1441350000

Also I'd be VERY surprised if this was the only recent sale.

Hey, you are maybe right, but you need to show us by showing us proof of sales. If you are suggesting unusuals, you need some sales for this price. You can use your sale too if you happen to sell this unusual! You can gather proof from:

1. Screenshoting your sale, how to find it? Go to your steam profile, then click on inventory http://prntscr.com/8bgjqb then on more and on history of sales http://prntscr.com/8bgk7o and screenshot the trade and upload it on Imgur by Printscreen or you can use Gyazo or Lightshot (if you dont know these words, try google)

2. Adding someone who have this hat and ask him for what did he bought it and try to ask him if he will screenshot his trade.

3. Use Julia script. What it does is compare differences between two snapshots of the inventory at different times. Comparing items added, removed, and altered between those two points. http://forums.backpack.tf/index.php?/topic/33627-user-script-compare-differences-between-inventory-snapshots-and-more/ As yo ucan see for example here http://backpack.tf/vote/id/55e5d78edea9e943238b462b

Another thing you need to know is overpay rule. That means if it sold for some unusual, you need to count the worth of the unusual x 0.9.

Another thing is, that the unusual for what it sold can be outdated, that means last accepted suggestion for it was more than 4 months ago. So you need to do a mini. Mini is minisugegstion, sale of the unusual, for what sold the original unusual you are suggesting.

Try looking at past accepted suggestions how to format the suggestions.

Suggesting unusuals isnt that easy, it has a lot of things you need to learn, but its possible, just read all of this:

http://backpack.tf/rules

http://backpack.tf/help/suggestions

http://forums.backpack.tf/index.php?/topic/6033-new-unusual-price-suggestion-guide-the-cheat-sheet/

https://www.youtube.com/watch?v=OwSKD9gN_Zg

If you have any questions about suggesting prices, feel free to ask any experienced suggester, they will answer you and help you with your suggestion.

tell you the shit one of 3 and i cant find one that dident sell on scm other than yours on bp.tf and thats how i find prices lol i dident evan find yours maybe steam bug idk

as a tip, many people also ask for a screenshot showing the hat's effect too. also hide your account/username