Let's see if I can do this once again. By the way, this suggestion reminds me of a puzzle (just a little side joke).

Classifieds:

http://backpack.tf/classifieds/?item=Crossing%20Guard&quality=11&tradable=1&craftable=1 A lot under 2.7-2.9 keys. There's definite need of a drop.

Steam Community Market (for side comparison and not for actually benefiting towards the suggestion):

http://steamcommunity.com/market/listings/440/Strange%20Crossing%20Guard - Fluctuating around the $5.7-$6 mark.

Sellers:

2 keys:

http://www.tf2outpost.com/trade/24685322 - Selling for 2 keys flat. Very young trade at 8 hours old.

~2.4 keys:

http://www.tf2outpost.com/trade/24682402 - Looking for 2 keys + 5 ref (~2.38 keys at key's current price). Young trade at 11 hours old.

~2.5 keys:

http://www.tf2outpost.com/trade/24662884 - Selling for 2 keys + 7 ref (~2.53 keys). Young trade at 1 day old.

~2.7-2.9 keys:

http://www.tf2outpost.com/trade/24612775 - Selling for 2 keys + 9 ref (~2.68 keys). 4 days old, but bumped occasionally.

http://www.tf2outpost.com/trade/24653841 - Looking for low end of the backpack.tf price (2.7 keys). He had one potential buyer, but it looks like it didn't sell. 2 days old.

http://www.tf2outpost.com/trade/24633480 - Looking for 2 keys + 9.33 (~2.7 keys at key's current price). No buyers for 3 days.

http://www.tf2outpost.com/trade/24689226 - Looking for 2 keys + 10 ref (~2.76 keys at key's current price). Very young trade at 4 hours old.

http://www.tf2outpost.com/trade/24676845 - Selling the Crossing Guard for "bp.tf price" (2.7-2.9 keys). Young trade at 20 hours.

http://www.tf2outpost.com/trade/24662754 - Bp.tf prices (2.7-2.9). Never bumped and one day old.

http://www.tf2outpost.com/trade/24650087 - Selling for 2.7-3 keys(?). Unsold for 2 days.

http://www.tf2outpost.com/trade/24627871 - Selling for 2 keys + 12 ref (~2.9 keys). Unsold for 3 days.

http://www.tf2outpost.com/trade/24649101 - "Higher end bp.tf price" (2.9 keys) for the Crossing Guard. Unsold for 2 days.

Solds:

http://www.tf2outpost.com/trade/24655656 - Sold for 2 keys + 4 ref (~2.3 keys)

http://www.tf2outpost.com/trade/24627104 - Sold for 2 keys + 9 ref (~2.68 keys)

Buyers:

All of them were buying them less than or equal to 2 keys, and none of them had any confirmed sales.

Conclusion: A very odd thing to price. There's not too many buyers, sellers, or sales altogether. I'm going to put the range at 2.5 to 2.7. While 2.3 did sell, it seems like it was a quicksell as there are no other sellers on the market at the moment that are selling for that low of an amount and 2.5 is around the minimum people are taking for it. Comments? Questions? Please feel free to ask and/or support/counter this suggestion. Thanks for reviewing.