It's honestly really puzzling as to why this hasn't been priced before...

https://steamcommunity.com/market/listings/440/Strange%20Vintage%20Camera%20Beard

Dividing by the average price of a key on that day.

1 sold on February 28th, 2020:

$3.91/$2.31 = 1.69 ~ 1.7 keys

1 sold on February 29th:

$3.96/$2.33 = 1.69 ~ 1.7 keys

1 sold on March 2nd:

$2.79/$2.33 = 1.2 keys

1 sold on March 7th:

$3.99/$2.33 = 1.71 ~ 1.7 keys

1 sold on March 14th:

$3.45/$2.25 = 1.53 ~ 1.5 keys

1 sold on March 17th:

$3.60/$2.19 = 1.64 ~ 1.6 keys

1 sold on March 27th:

$3.50/$2.17 = 1.61 ~ 1.6 keys

https://marketplace.tf/items/tf2/103;3;strange

Dividing by the average price of a key on that day.

1 sold on January 6th:

$3.40/$1.81 = 1.88 ~ 1.9 keys

1 sold on February 6th:

$3.51/$1.75 = 2 keys

1 sold on February 23rd:

$3.61/$1.77 = 2.03 ~ 2 keys

1 sold on February 26th:

$3.65/$1.77 = 2.06 ~ 2 keys

I'm excluding the 1.2 keys sale due to it being a low outlier.

Taking 1.5 keys - 2 keys as the range.