My first suggestion. thought i should do this cause its been really hard finding people who sell keys for less than 9 ref. Kept the range lower than the max (9.33) as there weren't as many sellers at 9.33 and its quite the jump. Probably to high for now, it will get there eventually. I will add more sellers and buyer proof in the future.

Buyers for 8.88:

http://www.tf2outpost.com/trade/19689001 (the first bot from below)

http://www.tf2outpost.com/trade/22505819 (the second bot '' '')

http://www.tf2outpost.com/trade/22684089 (out of stock selling for 8.88)

Sellers for 9 ref:

http://www.tf2outpost.com/trade/23077344

http://www.tf2outpost.com/trade/23075506

http://www.tf2outpost.com/trade/22435500

http://www.tf2outpost.com/trade/23103882 (says in his trade that he's buying for 8.88 ref)

http://www.tf2outpost.com/trade/23115065

Sellers for 9.11:

http://www.tf2outpost.com/trade/23080619

http://www.tf2outpost.com/trade/19689001 (is a bot, but still)(buying for 8.88)

http://www.tf2outpost.com/trade/23044575

http://www.tf2outpost.com/trade/22505819 (another bot)(buying for 8.88)

http://www.tf2outpost.com/trade/23114369

http://www.tf2outpost.com/trade/23064577 (trying to buy for 8.77 but cant)

http://www.tf2outpost.com/trade/23079783

9.22:

http://www.tf2outpost.com/trade/23062070 (sold 3 apparently)

http://www.tf2outpost.com/trade/23114472

http://www.tf2outpost.com/trade/21693244

http://www.tf2outpost.com/trade/22772219

http://www.tf2outpost.com/trade/22104836

9.33:

http://www.tf2outpost.com/trade/22556176

http://www.tf2outpost.com/trade/23083300

http://www.tf2outpost.com/trade/23113776

http://www.tf2outpost.com/trade/22939861

http://www.tf2outpost.com/trade/22556176

Solds for 8.88:

http://imgur.com/8bt3S23 (this one was me buying, but it was after an hour of searching for lower buyers, just look at my name history and you'll see how many times i changed it before i had to buy for 8.88)

http://imgur.com/SCYnihR (part 1)

http://imgur.com/N6aIhyh&PCmI4nt (part 2) sold for 8.88 each with a discount as it was 17 keys in bulk that he was buying

Solds for 9.00:

http://imgur.com/F3JztE4 (messy but, in the chat a guy is buying for 9 ref

http://imgur.com/wbsFpv5,vLKeWdw,jzWZ6nk,iNzhWPC#0 (7 keys bought for 9 ref)

the list could go on longer but i think I've made my point :/...... nevertheless, i hope you guys upvote :D

thank you too all the people who helped me get this far :D

PS: as i continue to search after making this, i will reply with more proofs.