Bot.tf:

https://i.imgur.com/jFPiBIm.jpg

https://bot.tf/stats/item?def=228&q=11&ef=&craft=1&aus=1&ks=0

Sales in Past Month:

11.01 keys(x3)

11.09 keys(x4)

11.10 keys(x4)

11.98 keys(x1)

11.99 keys(x3)

12 keys(x2)

Marketplace.tf:

$23.89 / $1.77 = 13.50 keys

$19.12 / $1.8 = 10.62 keys

$20.45 / $1.79 = 11.42 keys

$20.49 / $1.76 = 11.64 keys

$19.7 / $1.77 = 11.13 keys

$19.69 / $1.75 = 11.25 keys

$19.7 / $1.75 = 11.26 keys

$19.9 / $1.74 = 11.44 keys

$22.18 / $1.73 = 12.82 keys

$12 / $1.72 = 6.98 keys

$24.19 / $1.73 = 13.98 keys

$22.99 / $1.74 = 13.21 keys

$13.6 / $1.73 = 7.86 keys

$16.31 / $1.71 = 9.54 keys

$21 / $1.72 = 12.21 keys

$20.8 / $1.71 = 12.16 keys

$20.8 / $1.71 = 12.16 keys

$20.5 / $1.7 = 12.06 keys

$20 / $1.67 = 11.98 keys

$20 / $1.65 = 12.12 keys

$21.62 / $1.64 = 13.18 keys

$22 / $1.64 = 13.41 keys

$19 / $1.64 = 11.59 keys

$21.6 / $1.7 = 12.71 keys

$22.15 / $1.79 = 12.37 keys

$22.18 / $1.79 = 12.39 keys

$22.2 / $1.79 = 12.40 keys

$24.2 / $1.76 = 13.75 keys

$17.05 / $1.77 = 9.63 keys

$17.5 / $1.77 = 9.89 keys

Snapshot shows buyers for 11.49 keys,

Seller on MPTF for ~13 keys,

https://i.imgur.com/wRrMd98.jpg

Let's go with 11.60 - 12.80 keys.