Sales:

Bought for 36 keys: (unsure what sweets were added, if any at all)

http://backpack.tf/profiles/76561198066297722?time=1396249200 --->

http://backpack.tf/profiles/76561198066297722?time=1396854000

Sold for a Max, but Whoopee owner added Gen Shred Alert, All-Father, Sub-Zero Suit, Dashin’ Hashshashin, High-Five Taunt and 3 Merc’s Mufflers and 4 keys. (13.4 keys total in sweets)

2.85 buds (Max) – .7 buds (Sweets) = 2.15 buds (Whoopee)

http://backpack.tf/profiles/76561198123360464?time=1396594800 --->

http://backpack.tf/profiles/76561198123360464?time=1396681200

Sold for 2 buds, 5 keys and a Villain’s Veil (2.3 buds):

http://www.tf2outpost.com/trade/19060370 (Offer was 2 buds 10 keys, but negotiated to 2 buds, 5 keys and a veil in chat/trade, hidden but accepted)

http://backpack.tf/profiles/76561198066297722?time=1396854000 --->

http://backpack.tf/profiles/76561198066297722?time=1396940400

2 bud seller:

http://www.tf2outpost.com/trade/18941314 - 1 week unsold

Offers:

http://www.tf2outpost.com/trade/16808131 - Offered 46 keys recently (hidden) and replied saying he would take that if the keys were buds, but then changed his mind and didn’t accept when the guy got buds.

Another Vivid Whoopee owner commented on this trade, saying “i cna take 46 keys” (Don’t know why he didn’t just contact the person who offered 46 keys instead of commenting on the trade :P)

To sum up:

There was a 36 key (1.8 buds) sale, a 2.15 bud sale, a 2 bud seller (unsold), a 2.3 bud offer, and a 2.3 bud sale. That’s where we get the range.

Let me know if I need to add or change anything ^.^