Suggestion version 2.0 w/ fixed price ranges + extra information.

https://backpack.tf/classifieds?item=Gourd%20Grin&quality=11&tradable=1&craftable=1&australium=-1&killstreak_tier=0

Buy Orders start at 1.15 keys.

Sell Orders start at 2 keys.

Bot.tf Sales:

https://ibb.co/xX0Jgvy

https://ibb.co/CVWSPg1

2 Sold for 1.75 keys.

1 Sold for 2 keys.

2 Sold for 1.03, ~1.05 keys.

3 Sold for 1.3 keys.

2 Sold for 1.11, ~1.1 keys.

2 Sold for 1.03, ~1.05 keys.

1 Sold for 13 ref.

SCM Sales:

https://ibb.co/yyzwX2L

Prices fluctuate between around $3.05 - $3.79 on average in the last several days since Halloween ended, or around 1.32 (~1.3) - 1.64 (~1.65) keys, so I'll be using those ranges for those recent sales.

Excluding all other sales due to them being either too low for current buy orders, or too high for current sell orders. Going with 1.3 - 1.75 keys.