updating with 2 new sales both mine and correcting the old suggestion which had a 55 key pure sale yet it got forced into 50 keys by the conversion. only one sale from the previous suggestion is still valid. credits to Ned for that.

Ned's sale:

Sale 1:

http://www.tf2outpost.com/trade/25140830

backpack before: http://backpack.tf/profiles/76561198031566289?time=1424937600

backpack after: http://backpack.tf/profiles/76561198031566289?time=1425110400

Sold for 55 keys on the 28th of Febuary

55/12 = 4.58 rounded up to

4.6 buds

sale 2:

http://imgur.com/a/DnUjF

demonflame capo (50) offered on my scorching snaggle

~45 keys with overpay.

sale 3:

http://imgur.com/k1zvsYK,cVsqEm1#1

scorching snaggle + s.f. huntsman (w/ taunts + headshots) offered on my demonflame capo

50-7 = ~43 keys, no overpay as it was offered.

Arguably 55 keys is now an outlier, but I would say as it's the pure sale here its worth keeping.