Marketplace.tf sales:

Sale #1: $13.98 / $1.91 (https://manic.tf/keyprice/?at=2020-05-28) = 7.32 ~ 7.5 keys (outdated)

Sale #2: $19.99 / $1.92 (https://manic.tf/keyprice/?at=2020-07-28) = 10.41 ~ 10 keys

unknown item history and b/o was 6 keys + 10 ref ~ 6 keys (https://gyazo.com/620741873ea223526896cbffc8f3f44b)

Sale #3: $10.00 / $1.84 (https://manic.tf/keyprice/?at=2020-08-26) = 5.43 ~ 5.5 keys

unknown item history and unknown b/o.

Item tracing:

Item 1: https://backpack.tf/item/7957235370

Sale #4

untraced

https://backpack.tf/profiles/76561198089205859#!/compare/1592611200/1596153600

https://backpack.tf/profiles/76561198348240728#!/compare/1590969600/1592697600

Sale #5

traced 5 keys

https://backpack.tf/profiles/76561198348240728#!/compare/1590969600/1592697600 (broken date)

https://backpack.tf/profiles/76561198145632591#!/compare/1592870400/1592956800

Item 2: https://backpack.tf/item/7956931390

Sale #6

traced 1:1 + pure

Wicked Wood El Mostacho = Kill-a-Watt Respectless Robo-Glove + 5 keys

~11 keys (https://backpack.tf/suggestion/5f0522012bf77941a531dad2) = Kill-a-Watt Respectless Robo-Glove + 5 keys

Kill-a-Watt Respectless Robo-Glove = 6 keys

https://backpack.tf/profiles/76561198880720487#!/compare/1591228800/1592006400

https://backpack.tf/profiles/76561198868969121#!/compare/1591833600/1591920000

Sale #7

untraced

https://backpack.tf/profiles/76561198868969121#!/compare/1591920000/1592006400

https://backpack.tf/profiles/76561198071949575#!/compare/1591920000/1592006400

Sale #8

traced 1:1 + pure

Orbiting Planets Scotsman's Stove Pipe = Kill-a-Watt Respectless Robo-Glove + [1 keys + 2.44 ref ~ 1 keys]

~9 keys (https://backpack.tf/suggestion/5f0db0929f8dce388c220216) = Kill-a-Watt Respectless Robo-Glove + 1 keys

Kill-a-Watt Respectless Robo-Glove = 8 keys

https://backpack.tf/profiles/76561198868969121#!/compare/1591920000/1592006400

https://backpack.tf/profiles/76561198071949575#!/compare/1591920000/1592006400

Sale #9

untraced

https://backpack.tf/profiles/76561198071949575#!/compare/1592265600/1592524800

https://backpack.tf/profiles/76561198072618807#!/compare/1571443200/1592438400

Item 3: https://backpack.tf/item/7955978002

withdraw from DEPOSIT bot?

https://backpack.tf/profiles/76561199048087430#!/compare/1596672000/1596758400

https://backpack.tf/profiles/76561198841279602#!/compare/1596672000/1596758400

Sale #10

traced 6 keys

https://backpack.tf/profiles/76561198841279602#!/compare/1596758400/1596844800

https://backpack.tf/profiles/76561198214041479#!/compare/1596758400/1596844800

Sale #11

untraced

https://backpack.tf/profiles/76561198214041479#!/compare/1597363200/1597449600

https://backpack.tf/profiles/76561199065685030#!/compare/1597363200/1597449600 (have gone through all keys history here, but it got some weird transfer sequence)

Sale #12

no idea/missing

https://backpack.tf/profiles/76561199065685030#!/compare/1597363200/1597536000

https://backpack.tf/profiles/76561198830746068#!/compare/1596153600/1597449600

Sale #13

untraced

https://backpack.tf/profiles/76561198830746068#!/compare/1596153600/1597449600

https://backpack.tf/profiles/76561198080179568#!/compare/1597363200/1597449600

skip deposit to marketplace.tf

Item 4: https://backpack.tf/item/1775830660

only deposit to marketplace.tf

------------------

Current listings: https://gyazo.com/0c5fa9dbb81a0e1ec2df5553e4914939

Only buying at highest 6.02 ~ 6 keys

2 sellers on MP:

1 @ $14.00 / ~$1.83 = 7.65 keys (Item 3)

1 @ $19.00 / ~$1.83 = 10.38 keys (Item 4 - unsold for 3 months)

Valid sales: 6, 5.5, 5, 6, 8, 6

Excluding 5 and 5.5, lower than current highest buy order.

Taking 6 - 8 keys