Price is 3 months old

This is my first price suggestion on a hat I just bought, I don't know if I need more than one proof since there's only 2 in existence and the other one is just sitting in a backpack, and I don't intend to sell mine.

Price rounded to 47 from 46.5

Sale : http://www.tf2outpost.com/trade/26663455 (my second offer)

http://imgur.com/YJKuCT2,mZ2gAWc#0 (pictures of trade and hat)

Please tell me how bad I am at this and why I should never make a suggestion again ( ͡° ͜ʖ ͡°)