Neutron Star Plumber’s Pipe

New price: 16-18 keys

[proof below]

SALE #1 = 18 keys

https://backpack.tf/profiles/76561198120211406#!/compare/1500336000/1500422400

https://backpack.tf/profiles/76561198085126938#!/compare/1500336000/1500422400

http://www.tf2outpost.com/user/76561198085126938 - no B/O

Sold for an Eerie Orbiting Fire Scotch Bonnet (18)

SALE #2 = invalid

https://backpack.tf/profiles/76561198085126938#!/compare/1500249600/1500336000

https://backpack.tf/profiles/76561198185661291#!/compare/1500249600/1500336000

http://www.tf2outpost.com/trade/29270671

Appears to have sold fo a Smoking Cyborg Stunt Helmet (11). Countered by quickbuyers.

https://docs.google.com/spreadsheets/d/1zOs-0OfVjLsNYAmMa8_tvi2tA9Rrnok7nEUqDOQuls0/edit#gid=0

SALE #3 = 16 keys

https://backpack.tf/profiles/76561198185661291#!/compare/1499644800/1499731200

https://backpack.tf/profiles/76561198293651339#!/compare/1499644800/1499731200

http://www.tf2outpost.com/user/76561198293651339 - no B/O

Sold along 2 keys in key/metal for a Kill-a-Watt Hat of Cards (18) = 16 keys.

SUMMARY

Sales: 16 / 18 keys

Sellers: -

Going with 16-18 keys.