Although SCM buyers/sellers technically counter some sales, these seem to be buyers/sellers in isolation - the next available buyer/seller does not counter either of these sales for instance, so going to include them. Rounding to 30-40 ref for neatness.
Taking SCM sales from past day or so:
https://steamcommunity.com/market/pricehistory/?country=US¤cy=1&appid=440&market_hash_name=Mann%20Co.%20Supply%20Crate%20Series%20%239
0.526k (32.22)
0.552k (33.88)
0.551k (33.77)
0.492k (30.11) - one SCM buyer counters
0.606k (37.11)
0.643k (39.44) - one SCM seller counters
Although SCM buyers/sellers technically counter some sales, these seem to be buyers/sellers in isolation - the next available buyer/seller does not counter either of these sales for instance, so going to include them. Rounding to 30-40 ref for neatness.