Not many people buying this at full price anymore:

Proof from OP:

http://www.tf2outpost.com/trade/14504151 (~2.5 buds B/O)

http://www.tf2outpost.com/trade/13188113 (selling for miami nights nappers respite)

http://www.tf2outpost.com/trade/14470776 (~2.7 buds)

http://www.tf2outpost.com/trade/14332608 (55 keys= ~2.6 buds)

http://www.tf2outpost.com/trade/14384778 (56 keys= ~2.65 buds)

http://www.tf2outpost.com/trade/14469779 (49 keys= ~2.3 buds)

http://www.tf2outpost.com/trade/14345936 (55 keys= ~2.6 buds)

http://www.tf2outpost.com/trade/14213810 (53 keys & has ~2 keys worht of strange parts= ~2.5 buds)

http://www.tf2outpost.com/trade/14489484 (looking for around 2.5 buds in offers)

http://www.tf2outpost.com/trade/14345936 (55 keys=~2.6 buds)

http://www.tf2outpost.com/trade/14494194 (54 keys=~2.55 buds has soem SP)

also...

2 people on backpack.tf selling for 54 keys (~2.55 buds) (HusKy & Marcelo Araujo)

1 person selling for 56 keys (~2.65 buds) (Your Mom B>Backpacks 4 Paypal!)

1 person selling for 2.7 buds ([Ignition.SG]Chloe)

1 person selling for 57 keys ( _|GB|_ bbk6566)

1 person selling for 3.5 buds (imontheinterweb)

sorry if I did not show enough evidence or had wrong evidence, this is my first suggestion and I am fairly new to the tf2 economy with price changes. the names of players at the end of everyone selling the SF scattergun on backpack.tf are the people selling it because I am unable to upload screenshots of them to prove that prices they are selling them at and could not find a link that could easily show the price they are selling the item at.