When it comes to sales that include items like this, you need to include a "mini" to justify the price you attributed to the item in the sale, if it's price is not in date. From what I've been told, an "in-date" sale is usually within the last 3 months. The Pmoon headbouncers suggestion is a little over 4 months old, and may require a mini.

For example, in this trade, you valued the Pmoon headbouncers at 68 keys (96 - 28), but recent sale data on marketplace.tf indicates a higher value. https://marketplace.tf/items/tf2/31209;5;u201

According to this sale data, in the last 3 months, the pumpkin moon spooky head bouncers have sold anywhere from 132.95 USD with key prices at 1.83 (72.65 keys) to 139.8 USD while key prices were at 1.92 (72.81 keys).

In my opinion, you should be valuing the head bouncers a little higher than you are here.