That range.

This range is too wide is my very first impression,

Your low end seems to be inaccurate seeing how he had an offer of 1 bud + 2 keys. http://www.tf2outpost.com/trade/23606565 and also in the trade he mentioned that he sold it for 20 keys before in a couple of hours.

His backpack history actually confirmed the claim. You will be able to identify the 5 keys in addition to that through the item history id.

Here is how you identify it.(Make sure to sort by time)

Item history of the bud : http://backpack.tf/item/92361762 .

Item history of one of the keys: http://backpack.tf/item/2692139405

Look at the item id next to "JakeDunc"

The bud has this 3173982416

The key has this 3173982506

You see the two numbers are very close with the first 6 numbers the same. This shows that all these items were included in the same trade.

With that being said, your low end is inaccurate and low here with 1 bud + 5 keys sold quickly.

I would go with 2 buds flat. Please resuggest at 2 buds. Cheers.