Thanks to aj on the discord for the help!

2 year old price; out of date. Highest Buy Order at 25 keys, with others at 24 and 22.11, which is above the current range.

Item Sales:

Can't find any item sales.

Last months on Marketplace.tf:

5th September: Sold at $59.29, $1.83 per key = 32.4 keys

4th September: Sold at $59.29, $1.83 per key = 32.4 keys

Last month on SCM:

13th September, 1AM: Sold at £79.06, £1.80 per key = 43.9 keys

12th September, 1PM: Sold at £76.65, £1.81 per key = 42.3 keys

26th August, 11AM: Sold at £39.58, £1.83 per key = 21.6 keys

23rd August, 2PM: Sold at £60.31, £1.80 per key = 33.5 keys

23rd August, 6AM: Sold at £53.96, £1.82 per key = 29.6 keys

17th August, 6PM: Sold at £42.72, £1.88 per key = 22.7 keys

Because of the buy orders, I am going to ignore the sales at 21.6 and 22.7 keys. I am also ruling the two latest SCM sales as outliers, as they are way above the next highest sale.

That leaves us with sales:

1 @ 29.6 keys,

2 @ 32.4 keys,

1 @ 33.5 keys.

29.6-33.5 keys => 30-34 keys, rounded as per rules.