One recent sale.

Sale 1: Sold with 2 keys for Blizzardy Storm Party Phantom(Mini at 38 keys)

https://backpack.tf/profiles/76561198272038643#!/compare/1584748800/1584835200

https://backpack.tf/profiles/76561198272038643#!/compare/1584748800/1584835200

38-2 = 36 keys

Party Phantom:

https://backpack.tf/suggestion/5ec1ade6a7348f07f0108fdf

Yes, I know the suggested range is 37-45, however, there are 5 current sellers below 45:

https://gyazo.com/d9656653a8cb563de2630acfcf2abf7c

47 was marketplace and 50 was with items (overpay). Excluding 45, 47, and 50. Taking 37-39 keys for the Phantom.

Classifieds:

https://gyazo.com/ed0b55077b329d6869e142aad8deec60

One sale at 36. Taking 36 keys here.

The sellers for the Phantom are now gone, and so the suggested range seems accurate. Will wait to see if any lower sellers pop up before resuggesting.