Entire first page of outpost all being sold 2 for 1 key or 7.33-7.55 for one:

[/url]http://www.tf2outpost.com/search/240036227[/url]

2 tickets for 1 key(1 ticket for 7.66):

[url]http://www.tf2outpost.com/trade/24979210[/url]

[url]http://www.tf2outpost.com/trade/23363404[/url]

[url]http://www.tf2outpost.com/trade/25016784[/url]

Listings for 7.33-7.66:

[url]http://www.tf2outpost.com/trade/24918531[/url] = 7.33

[url]http://www.tf2outpost.com/trade/25039396[/url] = 7.55

[url]http://www.tf2outpost.com/trade/23077072[/url] = 7.33

[url]http://www.tf2outpost.com/trade/23789089[/url] = 7.33

There is no buying listings for proof, but if you were to go buy one then these are what almost all the listings look like (2 for 1 key or 7.33-7.55)