3 months old price, 3 buds is clearly a QS.

I took for my proof only non-KS and KS A. RL without or with few strange parts (the killstreak kit is worth less than 0.3 key on market so let's say that the KS quality doesn't add anything to the value of the weapon)

Note that solds are difficult to find.

Buyers (only picked the > 50 keys ~ 3.1 buds)

[url]http://www.tf2outpost.com/trade/23138005[/url] 50 keys ~ 3.1 buds

[url]http://www.tf2outpost.com/trade/22691793[/url] 50 keys ~ 3.1 buds

[url]http://www.tf2outpost.com/trade/22982226[/url] 52 keys ~ 3.2 buds

[url]http://www.tf2outpost.com/trade/23092757[/url] 3 buds 3 keys ~ 3.2 buds

[url]http://www.tf2outpost.com/trade/19523874[/url] 53 keys ~ 3.3 buds

[url]http://www.tf2outpost.com/trade/23078921[/url] 53 keys ~ 3.3 buds

[url]http://www.tf2outpost.com/trade/22866811[/url] 53 keys ~ 3.3 buds

[url]http://www.tf2outpost.com/trade/21333252[/url] 53 keys ~ 3.3 buds

[url]http://www.tf2outpost.com/trade/21670349[/url] 53 keys ~ 3.3 buds

And a lot more (I only checked the ones (auto)bumped the last 30min...)

Setting my low-end on the highest buyers

Quicksolds

[url]http://www.tf2outpost.com/trade/23157493[/url] B/O 3 buds, gone at 52 keys ~ 3.2 buds

[url]http://www.tf2outpost.com/trade/23090222[/url] Insta-add at 3 buds

[url]http://www.tf2outpost.com/trade/23191973[/url] B/O 3 buds, instasold

[url]http://www.tf2outpost.com/trade/23090951[/url] Quicksold for a clean level 1 (so overpay needed) Max -> 3.3 * 0.9 = 3 buds ([url]http://www.tf2outpost.com/item/440,2332079875,162,6[/url])

Solds

[url]http://www.tf2outpost.com/trade/23118191[/url] Sold for a clean Miami CM 4*0.9 = 3.6 buds ([url]http://www.tf2outpost.com/item/440,3060732624,523,5[/url])

[url]http://www.tf2outpost.com/trade/23136254[/url] (one of the buyers at 3.3 buds) 60 keys pure ~ 3.7 buds high end

[url]http://www.tf2outpost.com/trade/23138830[/url] B/O 3.5 buds instasold? asking confirmation to "d0 ( ͡° ͜ʖ ͡°) " but he's offline

[url]http://steamcommunity.com/market/listings/440/Strange%20Australium%20Rocket%20Launcher[/url] not any solds below 100€ (3.3 buds) since the 27th of September

Sellers (adding C/O or highest pure/mixed offers on each trade)

[url]http://www.tf2outpost.com/trade/23067881[/url] B/O 3.5 buds (50 keys + Bill's hat ~ 3.4 buds)

[url]http://www.tf2outpost.com/trade/23129111[/url] B/O 4 buds (3.3 buds pure made by Gstar declined)

[url]http://www.tf2outpost.com/trade/23192141[/url] B/O 4 buds

[url]http://www.tf2outpost.com/trade/23129036[/url] B/O 4 buds (3.25 buds pure, the C/O is about a clean DP Bonk but outdated)

[url]http://www.tf2outpost.com/trade/23098242[/url] no B/O, multiple offers of 3 buds pure declined

Any comments are welcome